accidental, a. [casual], fortuitous; [incidental], nonessential, adventitious.
accidentally, adv. unintentionally, casually, fortuitously. Antonyms: intentionally, [advisedly], deliberately.
acclimate, v. acclimatize.
acclimation, n. acclimatization.
accommodate, v. [adapt], conform, adjust; [oblige], [favor].
accommodating, a. [obliging], complaisant.
accommodation, n. [adaptation], [adjustment]; complaisance; [favor], [kindness].
accompaniment, n. concomitant.
accompany, v. [escort], [attend], [convoy]; chaperon.
accomplice, n. abettor, [ally], [accessory], [confederate], particeps criminis.