| Term | Definition |
| Abase | to humiliate, degrade |
| Abate | to reduce, lessen |
| Abduct | to give up a position, usally one of leadership |
| Abberation | something that differes from the norm |
| Abet | to aid, help, encourage |
| abhor | to hate, detest |
| abject | wretched, pitiful |
| Abnegation | denial of ocmfort to oneself |
| Abort | to give up on a half-finished project |
| Abridge | to cut down, shorten |
| Abrogate | to abolish, usually authority |
| Abscond | to sneak away and hide |
| Absolution | freedom from blame, guilt, sin |
| Abstain | to freely choose not to commit an action |
| Abstruse | hard to comprehend |
| Accede | to agree |
| Accentuate | to stress, highlight |
| Accessible | obtainable, reachable |
| Acclaim | high praise |
| Accolade | high praise, special distinction |
| Accommodating | helpful, obliging, polite |
| Accord | an agreement |
| Accost | to confront verbally |
| Accretion | slow growth in size or amount |
| Acerbic | biting, biter in tone or taste |
| Acquiesce | to agree without protesting |
| Acrimony | bitterness, discord |
| Acumen | keen insight |
| Acute | sharp, severe |
| Adamant | impervious, immovable, unyielding |
| Adept | extremely skilled |
| Adhere | to stick to something |
| Admonish | to caution, criticize, reprove |
| Adorn | to decorate |
| Adroit | skillful, dexterous |
| Adulation | extreme praise |
| Adumbrate | to sketch out in a vague way |
| Adverse | antagonistic, unfavorable, dangerous |
| Advocate | to agrue in favor of something, a person who argues in favor of something |
| Aesthetic | artistic, related to the appreciation of beauty |
| Affluent | rich, wealthy |
| Affront | an insult |
| Aggrandize | to increase or make greater |
| Amalgamate | to bring together, unite |
| Ambiguous | uncertain, variably interpretable |
| Ambivalent | having opposing feelings |
| Ameliorate | to improve |
| Amenable | willing, complaint |
| Amenity | an item that increase comfort |
| Amiable | friendly |
| Aesthetic | artistic, related to the appreciation of beauty |
| Affable | friendly, amiable |
| Aggregate | a whole or total, to gather into a mass |
| Aggrieved | distressed, wronged, injured |
| Agile | quick, nimble |
| Agnostic | believing that the existence of God cannot be proven or disproven |
| Agriculture | farming |
| Aisle | a passageway between rows of seats |