- abstract: not concrete; can't touch
- acclaim: applaud; praise
- acknowledge: recognize
- acquiesce: agree without protest
- adulation: admiration; flattery
- adversary: opponent
- adversity: difficulties; obstacles
- advocate: urge; plead for
- aesthetic: of or pertaining to beauty
- affable: friendly
- affirmation: confirmation
- alleviate: take away; relieve
- aloof: apart; reserved
- altruistic: unselfishly generous
- ambiguous: unclear in meaning