Online English Vocabulary Flashcards for ACT 10 (American College Testing) Words

accreditation (noun) /əˌkrɛd ɪˈteɪ ʃən/
Definition: The process of officially recognizing and certifying the competence, credibility, or quality of an organization, institution, program, or individual.
Example Sentence: "The conference attendees were required to provide proof of accreditation to access certain sessions."
Synonyms: approval; attestation; authentication; authorization; certification; confirmation
Opposite Meaning: decertification

acquaint (verb) /əˈkweɪnt/
Definition: To make someone familiar or knowledgeable about something or someone.
Example Sentence: "He was eager to acquaint himself with the latest research in his field."
Synonyms: accustom; disclose; educate; enlighten; familiarize; inform
Opposite Meaning: estrange

alliance (noun) /əˈlaɪ əns/
Definition: A formal or informal partnership or union formed between two or more individuals, groups, organizations, or nations to achieve a common goal or objective.
Example Sentence: "The two companies formed an alliance to expand their market reach."
Synonyms: affiliation; association; coalition; collaboration; compact; confederation
Opposite Meaning: rivalry

ambient (adjective) /ˈambɪənt/
Definition: Relating to the surrounding environment or atmosphere, often emphasizing its immediate, encompassing quality.
Example Sentence: "The ambient lighting in the restaurant created a cozy and intimate atmosphere."
Synonyms: atmospheric; background; circumambient; circumferential; climatic; current
Opposite Meaning: central

amok (adverb) /əˈmɒk/
Definition: In a state of chaotic and uncontrollable frenzy or disorderly behavior.
Example Sentence: "The mob ran amok, ransacking stores and setting fires in the streets."
Synonyms: berserk; bonkers; chaotic; confused; crazed; disorderly
Opposite Meaning: orderly

appendage (noun) /əˈpɛndɪdʒ/
Definition: A part that is attached or added to something larger, typically a limb or an extension of the body.
Example Sentence: "The surgeon skillfully reattached the severed appendage."
Synonyms: accessory; addition; adjunct; annex; attachment; extension
Opposite Meaning: core

artifact (noun) /ˈɑr təˌfækt/
Definition: An object made or modified by human hands, typically with historical, cultural, or archaeological significance.
Example Sentence: "The museum displayed a collection of ancient artifacts from various civilizations."
Synonyms: antiquity; curio; fossil; item; object; piece
Opposite Meaning: natural object

assortment (noun) /əˈsɔrt mənt/
Definition: A varied collection or grouping of different types of items or things.
Example Sentence: "The gourmet chocolate shop presented an exquisite assortment of truffles and bonbons."
Synonyms: array; assemblage; choice; collection; compilation; diversity
Opposite Meaning: uniformity

bedouin (noun) /bedʊɪn/
Definition: A nomadic or semi-nomadic ethnic group primarily found in the deserts of the Middle East and North Africa.
Example Sentence: "The Bedouin tribe migrated across the desert in search of grazing land for their camels."
Synonyms: gypsy; herder; itinerant; nomad; roamer; rover
Opposite Meaning: settler

binge (verb) /bɪndʒ/
Definition: To indulge in a particular activity or behavior excessively and compulsively, often over a relatively short period of time.
Example Sentence: "He had a tendency to binge-watch entire seasons of TV shows in one sitting."
Synonyms: cram; devour; engorge; feast; gorge; guzzle
Opposite Meaning: abstain

boulevard (noun) /ˈbʊl əˌvɑrd/
Definition: A wide and spacious road, typically lined with trees, sidewalks, and often adorned with green spaces or landscaped features.
Example Sentence: "The couple took a leisurely stroll along the bustling boulevard, enjoying the city lights."
Synonyms: avenue; drive; expressway; highway; lane; parkway
Opposite Meaning: alley

calamity (noun) /kəlæmɪti/
Definition: A disastrous or catastrophic event that brings about great distress, suffering, or loss.
Example Sentence: "The pandemic has been a global calamity, affecting millions of lives."
Synonyms: adversity; affliction; cataclysm; catastrophe; crisis; devastation
Opposite Meaning: fortune

candidate (noun) /ˈkæn dɪˌdeɪt/
Definition: An individual who is being considered or put forward for a specific position, role, or opportunity, typically through a selection or election process.
Example Sentence: "The job candidate impressed the interview panel with their qualifications and experience."
Synonyms: applicant; aspirant; competitor; contender; contestant; hopeful
Opposite Meaning: non-contender

canine (adjective) /ˈkeɪ naɪn/
Definition: Pertaining to dogs or characteristics of dogs.
Example Sentence: "The police officer relied on her highly trained canine partner to assist in search and rescue operations."
Synonyms: bowwow; doggy; doglike; hound; lapdog; lupine
Opposite Meaning: feline

compatible (adjective) /kəmˈpæt ə bəl/
Definition: Having the ability of two or more things to exist or function together harmoniously, without conflict or contradiction.
Example Sentence: "These two artists have a compatible artistic vision, which is why they often collaborate on projects."
Synonyms: adaptable; agreeable; aligned; amicable; coherent; complementary
Opposite Meaning: incompatible

comprise (verb) /kəmˈpraɪz/
Definition: To consist of or include something as a part or component.
Example Sentence: "The anthology comprises short stories from various emerging writers."
Synonyms: contain; embody; embrace; enclose; encompass; include
Opposite Meaning: exclude

conclusive (adjective) /kənˈklu sɪv/
Definition: Providing a definitive or final resolution to a matter or question, leaving no room for doubt or further debate.
Example Sentence: "The DNA test provided conclusive evidence linking the suspect to the crime scene."
Synonyms: certain; convincing; decisive; definitive; determining; final
Opposite Meaning: ambiguous

congeal (verb) /kənˈdʒiːl/
Definition: To transform a liquid or substance from a fluid or semi-liquid state into a solid or gel-like state as it cools or thickens.
Example Sentence: "Blood can congeal quickly when exposed to air, making it difficult to clean."
Synonyms: clot; coagulate; condense; curdle; freeze; gelatinize
Opposite Meaning: liquefy

constitution (noun) /ˌkɒn stɪˈtu ʃən/
Definition: A fundamental set of principles or established rules that govern the operation and organization of a nation, state, or organization.
Example Sentence: "The country's constitution guarantees freedom of speech and expression."
Synonyms: charter; code; doctrine; foundation; framework; governance
Opposite Meaning: anarchy

credible (adjective) /ˈkrɛdəbəl/
Definition: Trustworthy, believable, or deserving of confidence and acceptance.
Example Sentence: "The credible performance of the actor made the audience believe in his character."
Synonyms: believable; compelling; conceivable; conclusive; convincing; plausible
Opposite Meaning: dubious

criterion (noun) /kraɪˈtɪər i ən/
Definition: A standard or principle used to assess, evaluate, or judge something.
Example Sentence: "Honesty is a primary criterion for selecting trustworthy employees."
Synonyms: benchmark; gauge; guideline; indicator; measure; parameter
Opposite Meaning: exception

culpable (adjective) /ˈkʌlpəb(ə)l/
Definition: Deserving of blame, guilt, or responsibility for a particular action, decision, or situation.
Example Sentence: "The judge ruled that the company was culpable for the harm caused by their product."
Synonyms: accountable; answerable; blameworthy; censurable; errant; guilty
Opposite Meaning: innocent

custody (noun) /ˈkʌs tə di/
Definition: The legal right and responsibility for the care, control, and protection of a person or property.
Example Sentence: "The divorced couple had joint custody of their two children."
Synonyms: care; charge; control; detainment; guardianship; hold
Opposite Meaning: release

customize (verb) /kʌstəmaɪz/
Definition: To modify or tailor something according to specific preferences, needs, or specifications.
Example Sentence: "The company offers the option to customize their products with personalized engravings."
Synonyms: adapt; adjust; configure; craft; fashion; individualize
Opposite Meaning: standardize

debilitated (adjective) /dɪˈbɪlɪteɪtɪd/
Definition: Extreme weakness, exhaustion, or incapacitation.
Example Sentence: "The flu left her feeling debilitated, unable to get out of bed for days."
Synonyms: ailing; drained; enervated; exhausted; fatigued; feeble
Opposite Meaning: strong

density (noun) /ˈdɛn sɪ ti/
Definition: The measure of how closely packed or concentrated the particles or components of a substance are within a given volume.
Example Sentence: "The population density of the city has been steadily increasing over the years."
Synonyms: abundance; compactness; concentration; crowding; frequency; heaviness
Opposite Meaning: sparsity

disorderly (adjective) /dɪsˈɔr dər li/
Definition: Characterized by a lack of order, organization, or discipline.
Example Sentence: "The party ended in a disorderly fashion, with guests spilling drinks and shouting loudly."
Synonyms: chaotic; disorganized; haphazard; lawless; messy; rowdy
Opposite Meaning: orderly

domicile (noun) /ˈdɒmɪsɪl/
Definition: A person's permanent residence or the place where they consider their home.
Example Sentence: "He established his domicile in the United States after immigrating from Canada."
Synonyms: abode; accommodation; address; dwelling; habitation; home
Opposite Meaning: office

emancipate (verb) /ɪˈmæn səˌpeɪt/
Definition: To liberate or set free from bondage, oppression, or a state of subjugation.
Example Sentence: "The legislation was enacted to emancipate workers from exploitative labor conditions."
Synonyms: deliver; disenthrall; extricate; free; liberate; release
Opposite Meaning: subjugate

encroach (verb) /ɪnˈkrəʊtʃ/
Definition: To gradually intrude or interfere with something, typically without permission or right.
Example Sentence: "Soldiers at the border began to encroach upon enemy territories."
Synonyms: creep; entrench; impinge; infringe; invade; overreach
Opposite Meaning: retreat

enshrine (verb) /ɛnˈʃraɪn/
Definition: To preserve, protect, or establish something, typically a principle, idea, value, or belief, in a revered or sacred manner.
Example Sentence: "We enshrine the memory of our fallen heroes in our hearts."
Synonyms: canonize; cherish; commemorate; consecrate; honor; immortalize
Opposite Meaning: desecrate

eventuality (noun) /əˌvɛnʧuˈælɪti/
Definition: A possible or potential outcome or occurrence, particularly one that may be unexpected or uncertain.
Example Sentence: "Preparing for every eventuality is essential in emergency management."
Synonyms: aftereffect; capability; case; chance; contingency; event
Opposite Meaning: impossibility

evolution (noun) /ˌɛv əˈlu ʃən/
Definition: The gradual process of change and development over time.
Example Sentence: "The theory of evolution proposes that species change over time through natural selection."
Synonyms: adaptation; advancement; change; development; growth; innovation
Opposite Meaning: stagnation

experienced (adjective) /ɪkˈspɪər i ənst/
Definition: Having a significant amount of knowledge, skill, or expertise in a particular field or area due to having encountered and actively participated in various relevant situations or activities.
Example Sentence: "The experienced doctor quickly diagnosed the patient's condition."
Synonyms: adept; competent; expert; knowledgeable; practiced; proficient
Opposite Meaning: inexperienced

exploit (verb) /ˈɛkˌsplɔɪt/
Definition: To take advantage of something or someone for one's own benefit.
Example Sentence: "The athlete was accused of trying to exploit his opponent's injury during the game."
Synonyms: abuse; capitalize; cheat; leverage; manipulate; milk
Opposite Meaning: protect

fervent (adjective) /ˈfəːv(ə)nt/
Definition: Describing a passionate, intense, and deeply emotional level of enthusiasm or commitment towards a belief, cause, or activity.
Example Sentence: "He was a fervent fan of the local soccer team and attended every game of the season."
Synonyms: ardent; devout; eager; earnest; enthusiastic; fervid
Opposite Meaning: indifferent

flaunt (verb) /flɔːnt/
Definition: To display or show off something, usually in a bold, conspicuous, or boastful way.
Example Sentence: "The students flaunt their rebellious nature to challenge authority."
Synonyms: boast; brandish; broadcast; exhibit; expose; flash
Opposite Meaning: hide

fuse (verb) /fyuz/
Definition: To join or combine two or more things together to form a unified whole.
Example Sentence: "The artist attempted to fuse elements of abstract and realist styles in her painting."
Synonyms: amalgamate; blend; coalesce; combine; consolidate; incorporate
Opposite Meaning: separate

gaping (adjective) /ˈɡeɪpɪŋ/
Definition: Wide open or exposed, usually in a way that is unexpected or surprising.
Example Sentence: "The wound on his arm was gaping and required immediate medical attention."
Synonyms: ajar; broad; cavernous; chasmal; exposed; revealed
Opposite Meaning: closed

genetic (adjective) /dʒɪnetɪk/
Definition: Relating to genes, which are the hereditary units that carry and transmit the genetic information in living organisms.
Example Sentence: "The child inherited his father's genetic traits, including his eye color and hair texture."
Synonyms: ancestral; biological; chromosomal; genetical; genomic; hereditary
Opposite Meaning: acquired

gullible (adjective) /ˈɡʌlɪbl/
Definition: Easily deceived or tricked because of one's naivety, trustfulness, or lack of skepticism.
Example Sentence: "The scam artist preyed on the gullible and unsuspecting."
Synonyms: credulous; exploitable; foolish; innocent; naive; simple
Opposite Meaning: skeptical

illuminate (verb) /ɪˈlu məˌneɪt/
Definition: To provide light or brightness, both literally and metaphorically.
Example Sentence: "The professor's lecture on philosophy sought to illuminate the intricate nature of human existence."
Synonyms: brighten; clarify; disclose; elucidate; enlighten; explain
Opposite Meaning: darken

indefinitely (adverb) /ɪnˌdɛf(ɪ)nɪtli/
Definition: Lacking a specific or predetermined limit in terms of time, duration, or extent.
Example Sentence: "The company decided to put the project on hold indefinitely."
Synonyms: continuously; endlessly; eternal; forever; ongoing; permanent
Opposite Meaning: temporarily

informed (adjective) /ɪnˈfɔrmd/
Definition: Possessing knowledge, understanding, or awareness on a particular subject or issue.
Example Sentence: "The doctor made an informed decision to change the treatment plan."
Synonyms: acquainted; aware; cognizant; educated; enlightened; instructed
Opposite Meaning: ignorant

intellectual (adjective) /ˌɪn tlˈɛk tʃu əl/
Definition: Relating to intellect, intelligence, or advanced thinking.
Example Sentence: "He is known for his intellectual prowess and ability to grasp complex concepts."
Synonyms: academic; astute; brainy; cerebral; cognitive; erudite
Opposite Meaning: ignorant

interact (verb) /ˌɪntərˈakt/
Definition: To engage with or communicate with others.
Example Sentence: "The students were encouraged to interact with each other during group activities."
Synonyms: collaborate; connect; contact; cooperate; interface; interplay
Opposite Meaning: ignore

juxtaposed (adjective) /ˈdʒʌk stəˌpoʊzd/
Definition: Placing two or more contrasting or distinct elements side by side, creating a deliberate comparison or contrast.
Example Sentence: "The director skillfully juxtaposed scenes of joy and sorrow to evoke a range of emotions in the audience."
Synonyms: clashing; conflicting; contrasting; counterposed; divergent; juxtapositional
Opposite Meaning: merge

mannequin (noun) /ˈmæn ɪ kɪn/
Definition: A life-sized, often stylized, human figure used primarily in the fashion industry to display clothing, accessories, or other products.
Example Sentence: "The fashion designer meticulously draped the fabric on the mannequin to create the perfect silhouette."
Synonyms: display; dummy; effigy; figure; form; model
Opposite Meaning: human

miniature (adjective) /ˈmɪn i ə tʃər/
Definition: Greatly reduced in size or scale compared to its standard or typical form.
Example Sentence: "The dollhouse featured a collection of miniature furniture and decorations."
Synonyms: compact; dainty; diminutive; little; microscopic; minuscule
Opposite Meaning: large

multitude (noun) /ˈmʌltɪtjuːd/
Definition: A large number or a vast quantity of people, things, or entities gathered together or existing in a particular context.
Example Sentence: "A multitude of stars could be seen in the night sky."
Synonyms: assemblage; collection; crowd; flock; horde; host
Opposite Meaning: few

native (adjective) /ˈneɪtɪv/
Definition: Inherent, originating, or characteristic of a particular place, region, or group.
Example Sentence: "She is a native New Yorker, born and raised in the bustling city."
Synonyms: aboriginal; authentic; autochthonous; domestic; endemic; homegrown
Opposite Meaning: foreign

negligence (noun) /ˈnɛg lɪ dʒəns/
Definition: The act or state of neglecting one's duty or failing to exercise reasonable care, resulting in harm, damage, or injury to others.
Example Sentence: "The doctor was sued for medical negligence after a mishap during surgery."
Synonyms: apathy; carelessness; dereliction; disregard; heedlessness; inattention
Opposite Meaning: diligence

obesity (noun) /oʊˈbi sɪ ti/
Definition: A medical condition characterized by an excessive accumulation of body fat, to the extent that it has a detrimental effect on an individual's health.
Example Sentence: "The doctor warned the patient about the health risks associated with obesity."
Synonyms: adiposity; bulkiness; chubbiness; corpulence; fatness; heaviness
Opposite Meaning: leanness

obscurity (noun) /əbˈskyʊər ɪ ti/
Definition: The state or condition of being unknown, unnoticed, or lacking widespread recognition or understanding.
Example Sentence: "The actress rose from obscurity to become a household name overnight."
Synonyms: ambiguity; anonymity; darkness; hiddenness; inconspicuousness; indistinctness
Opposite Meaning: fame

occupy (verb) /ˈɒk yəˌpaɪ/
Definition: To take control, possession, or ownership of a place, area, or space.
Example Sentence: "The students occupy the classroom during school hours."
Synonyms: control; dominate; engage; ensconce; fill; inhabit
Opposite Meaning: vacate

omission (noun) /oʊˈmɪʃ ən/
Definition: The act of leaving out or neglecting something, intentionally or unintentionally, that should have been included or mentioned.
Example Sentence: "The report contained several omissions that affected its accuracy."
Synonyms: deficiency; disregard; exclusion; failure; lapse; neglect
Opposite Meaning: inclusion

paraphernalia (noun) /ˌparəfəˈneɪlɪə/
Definition: A collection of equipment, tools, or other items used for a particular purpose or activity.
Example Sentence: "The trade show booth was adorned with promotional paraphernalia."
Synonyms: apparatus; appurtenances; belongings; equipage; gear; impedimenta
Opposite Meaning: absence

peculiarity (noun) /pɪˌkyʊ liˈær ɪ ti/
Definition: A distinctive or unusual quality, characteristic, or behavior that sets someone or something apart from the norm.
Example Sentence: "Her habit of collecting vintage typewriters was one of her most cherished peculiarities."
Synonyms: abnormality; anomaly; deviation; distinctiveness; eccentricity; idiosyncrasy
Opposite Meaning: normality

peeved (adjective) /pivd/
Definition: Mild annoyance or irritation.
Example Sentence: "She was peeved when her favorite coffee shop ran out of her preferred blend."
Synonyms: agitated; annoyed; bothered; disgruntled; exasperated; irked
Opposite Meaning: pleased

peripheral (adjective) /pɪˈrɪf(ə)rəl/
Definition: Located on the outer edge or boundary of an area, or is of secondary importance.
Example Sentence: "The peripheral vision of the driver allowed him to see the approaching car."
Synonyms: accessory; additional; auxiliary; contributory; exterior; external
Opposite Meaning: central

pernickety (adjective) /pəˈnɪkɪti/
Definition: Excessively fussy, particular, or demanding, often with small or insignificant details.
Example Sentence: "His pernickety nature made him a difficult person to work with."
Synonyms: choosy; demanding; exacting; fastidious; finicky; hairsplitting
Opposite Meaning: undemanding

promising (adjective) /ˈprɒm ə sɪŋ/
Definition: Showing signs of potential, likelihood, or future success.
Example Sentence: "The promising young athlete broke several records in her debut competition."
Synonyms: assuring; auspicious; bright; budding; encouraging; favorable
Opposite Meaning: unpromising

prosecute (verb) /ˈprɒs ɪˌkyut/
Definition: To initiate and carry out legal proceedings against a person or organization accused of committing a crime.
Example Sentence: "The district attorney decided to prosecute the suspect for robbery."
Synonyms: bring; charge; enforce; indict; litigate; proceed
Opposite Meaning: pardon

purge (verb) /pəːdʒ/
Definition: To remove or eliminate something, typically in a systematic and forceful manner.
Example Sentence: "The chief promised to purge the force of corruption within the next six months."
Synonyms: cleanse; clear; dismiss; eject; empty; eradicate
Opposite Meaning: retain

reverse (adjective) /rɪˈvɜrs/
Definition: Opposite or contrary in direction, order, or nature to what is considered standard, typical, or expected.
Example Sentence: "She wore her jacket in reverse, with the zipper at the back."
Synonyms: antithetical; backwards; contra; contrary; converse; inverse
Opposite Meaning: same

robes (noun) /roʊb/
Definition: Loose, flowing garments typically worn as a form of ceremonial or formal attire.
Example Sentence: "The monk gracefully moved in his saffron robes, emanating tranquility and peace."
Synonyms: attire; cassock; cloak; clothing; dress; garments
Opposite Meaning: clothes

skepticism (noun) /ˈskɛp təˌsɪz əm/
Definition: An attitude or state of mind characterized by doubt, questioning, or a tendency to withhold belief or acceptance of certain claims, ideas, or propositions.
Example Sentence: "Her skepticism led her to question the validity of the scientific study."
Synonyms: cynicism; disbelief; doubt; doubtfulness; hesitation; incredulity
Opposite Meaning: credulity

spirited (adjective) /ˈspɪr ɪ tɪd/
Definition: Lively, energetic, and full of enthusiasm.
Example Sentence: "The spirited debate among the students showcased their passionate opinions."
Synonyms: animated; buoyant; dynamic; effervescent; energetic; enthusiastic
Opposite Meaning: lethargic

splutter (verb) /ˈsplʌt ər/
Definition: To speak or utter words in a rapid, disjointed, or faltering manner.
Example Sentence: "She would always splutter when trying to speak in front of a large audience."
Synonyms: babble; blabber; blurt; falter; fumble; garble
Opposite Meaning: articulate

statement (noun) /ˈsteɪt mənt/
Definition: A formal or informal expression of facts, opinions, ideas, or beliefs presented in a clear and coherent manner.
Example Sentence: "The company issued a statement apologizing for the product recall."
Synonyms: affirmation; announcement; assertion; avowal; claim; declaration
Opposite Meaning: question

substitute (noun) /ˈsʌb stɪˌtut/
Definition: A person or thing that takes the place or acts as a replacement for someone or something else.
Example Sentence: "The coach decided to bring in a substitute player to give the star athlete a break."
Synonyms: alternate; backup; cover; deputy; proxy; replacement
Opposite Meaning: original

suggestion (noun) /səgˈdʒɛs tʃən/
Definition: A proposal, idea, or recommendation put forth to offer guidance, advice, or a potential course of action.
Example Sentence: "He offered a helpful suggestion on how to improve the project's efficiency."
Synonyms: advice; clue; counsel; hint; idea; input
Opposite Meaning: order

supernatural (adjective) /ˌsu pərˈnætʃ ər əl/
Definition: Beyond the scope of natural laws and scientific explanation.
Example Sentence: "The psychic predicted future events with her supernatural abilities."
Synonyms: divine; ethereal; fantastical; magical; mystic; mystical
Opposite Meaning: natural

tamper (verb) /ˈtampə/
Definition: To interfere with or manipulate something in an unauthorized or improper way, often for the purpose of causing damage or achieving a desired outcome.
Example Sentence: "It's important not to tamper with a crime scene before the police arrive."
Synonyms: adjust; alter; change; corrupt; damage; distort
Opposite Meaning: preserve

vulgar (adjective) /ˈvʌl gər/
Definition: Crude, coarse, or lacking in refinement.
Example Sentence: "The comedian's jokes were often vulgar and crossed the line of decency."
Synonyms: coarse; crass; crude; indecent; lewd; lowbrow
Opposite Meaning: refined