accustom, v. [habituate], [familiarize], inure.
accustomed, a. [customary], [wonted], [habitual], [usual]. Antonyms: [unaccustomed], [unfamiliar], unwonted.
achieve, v. [accomplish], effectuate, [realize], [effect], [attain].
achievement, n. [accomplishment], [attainment], effectuation [feat], [exploit].
acknowledge, v. [admit], avow, concede, [own], [confess]. Antonyms: [repudiate], [deny], disavow.
acknowledgment, n. [admittance], avowal, concession, recognition.
acme, n. culmination, [top], [zenith], [climax], apex, [pinnacle].
acorns, n. pl. [mast]. Associated words: balaniferous, balanoid, cupule, cupuliferous, quercite, racahout.
acquaint, v. [familiarize], inform, [tell], apprise, [notify].
acquaintance, n. [familiarity]; [kith]. Antonyms: [ignorance], unfamiliarity, unacquaintance.