acrophobia, aerophobia, aghast, agitated, agoraphobia, ailurophobia, allay, angst, anxiety, anxious, apprehension, apprehensive, aquaphobia, arachnophobia, astraphobia, consternation, cynophobia, daunting, disconcerting, dread, dreadful, duress, fearful, flustered, foreboding, frantic, fraught, frightening, ghastly, horrible, impatient, jeopardy, jittery, jumpy, leery, nervous, neurotic, paranoia, perilous, perturb, perturbed, phobia, skittish, specter, spectre, technophobe, tension, timid, timorous, trepidation, unease, unnerving, vulnerable, worry, zoophobia