abut, amphitheater, aqueduct, arena, atrium, avenue, awning, baluster, banister, bedrock, boulevard, buttress, canopy, carriageway, casita, chamber, citadel, cladding, concourse, contraption, cornice, courtyard, crypt, dwelling, edifice, enclosure, ergonomic, excavate, eyesore, facility, flume, forecourt, foyer, gable, galleria, gazebo, guardrail, gutter, hollow, infrastructure, mausoleum, newel, obelisk, overhang, parapet, partition, parvis, pergola, peristyle, plaza, portcullis, quadrangle, rafter, railing, ramshackle, rickety, scupper, stockade, terrace, turnstile, veranda, vestibule