| Term | Definition |
| allocate | allot |
| allure | charm |
| allusion | hint |
| ally | partner |
| aloft | overhead |
| aloof | cold |
| altruistic | humane |
| altruism | humanity |
| amalgamate | combine |
| amalgamation | joining |
| amateurish | inexpert |
| ambiguity | vagueness |
| ambivalence | doubt |
| ambivalent | unsure |
| ameliorate | upgrade |
| amenable | agreeable |
| amiable | friendly |
| amicable | harmonious |
| amity | harmony |
| amorous | passionate |
| amorphous | shapeless |
| amphibious | living on land and in water |
| ample | plentiful |
| anachronism | misdate |
| anachronistic | out-of-date |
| analgesic | painkiller |
| anarchist | agitator |
| anatomical | concerned with the study of the structure of human or animal bodies |
| ancillary | auxiliary |
| anecdote | story |
| anguish | suffering |
| animated | lively |
| annul | cancel |
| anomaly | irregularity |
| anonymous | nameless |
| antagonism | antipathy |
| antagonize | enrage |
| anthropomorphize | personify |
| anticipatory | prompt |
| antidote | cure |
| antipathy | enmity |
| antiquarian | a person who studies, collects or sells antiques |
| antique | old |
| antithesis | opposite |
| antithetical | converse |
| apathetic | indifferent |
| apathy | dispassion |
| ape | copy |
| aplomb | poise |
| apocalyptic | prophetic |
| apogee | zenith |
| apostate | denouncer |
| apostle | promoter |
| appalling | shocking |
| apparent | obvious |
| apparition | ghost |
| abate | to make less |
| abatement | reduction |
| abdicate | to give up a powerful position |
| aberrant | not normal state |
| aberration | a deviation from the way things normally happen or are done |
| aboveboard | honest and open |
| abrasive | rough |
| abridge | to make shorter by using fewer words |
| abrupt | sudden and unexpected |
| abstemious | not doing things which give pleasure, especially in eating and drinking |
| abstinence | the practice of keeping away from something one enjoys |
| abstruse | difficult to understand |
| abundant | plentiful |
| abysmal | poor in quality |
| accede | to take a high position after someone has left |
| abrasive | rude and agressive |
| accede | to agree to a proposal or a request |
| accolade | praise |
| accomodate | to provide lodging or room |
| accomodate | to do or provide what somebody wants |
| accord | to give something to somebody |
| accord | agreement or peace treaty |
| accumulate | to collect a number or quantity over a period of time |
| acerbic | harsh and sharp |
| acme | highest stage of development |
| acne | inflammation of the oil glands of the skin, producing red pimples on the fce and neck |
| acquiesce | to accept something without arguing |
| acquisitive | keen on getting and possessing things |
| acrimonious | bitter |
| acumen | ability to think and judge quickly and clearly |
| adhere | to stick firmly; to remain attached |
| adhere | to support or hold an opinion or belief |
| adjudicate | to act as a judge in a court, tribunal, contest, etc. |
| adjunct | a thing that is attached or added to something else but is not an essential part of it |
| admonish | to warn someone gently that they have done something wrong |
| adroit | quick and skillful |
| adulation | admiration |
| adulatory | admiring |
| adversity | unfortunate condition |
| advocate | to recommend or say that one supports a particular plan of action |
| aegis | protection or patronage |
| aesthetic | concerned with beauty and the appreciation of beauty |
| affected | not natural or genuine |
| affirm | to state something as the truth |
| affliction | a thing that causes suffering |
| affluence | wealth |
| affront | insult |
| aficionado | fan |
| aggravate | to make worse or more serious |
| aghast | filled with surprise |
| agile | able to move quickly and easily |
| agitate | excite |
| agitation | protest |
| agnostic | a person who believes that nothing can be known about the existence of god or of anything except material things |
| agnosticism | belief that nothing can be known about the existence of god or of anything except material things |
| akin | related or like something |
| alacrity | eagerness |
| alibi | excuse |
| align | to place or arrange in a straight line so that they are parallel to something else |
| allay | to make less |
| allegory | parable |
| appease | soothe |
| appraisal | judgment |
| appraise | judge |
| apprehend | understand |
| apprehension | fear |
| apprehensive | fearful |
| approbation | approval |
| apt | appropriate |
| aptitude | talent |
| arable | farmable |
| arbiter | judge |
| arbitration | judgment |
| arboreal | living in trees |
| arcane | secret |
| archaic | ancient |
| archetypal | typical |
| archetype | prototype |
| archipelago | island-chain |
| arduous | strenuous |
| aristocratic | noble |
| aroma | odor |
| articulate | enunciate |
| ascetic | priest |
| acribe | apply |
| assail | assault |
| assault | assail |
| assemblage | assembly |
| assiduous | industrious |
| assimilate | absorb |
| assuage | satisfy |
| atheism | the belief that there is no god |
| atheist | a person who the believes that there is no god |
| atrophy | shrivel |
| attenuate | reduce |
| attribute | credit |
| audacity | boldness |
| audit | check |
| augment | add |
| augur | indicate |
| aura | feeling |
| auspicious | favorable |
| authentic | true |
| autocrat | dictator |
| autocratic | like an autocrat |
| autonomy | self-government |
| avant-grande | toward |
| avaricious | greedy |
| avocation | hobby |
| avuncular | uncle-like, kind |
| backlash | backfire |
| baffle | confuse |
| banality | commonplace |
| bane | ruin |
| baneful | harmful |
| barb | insult |
| baroque | ornate |