| A | B |
| Aberrant | Markedly different from an accepted norm. |
| Aberration | Deviation from a right |
| Abet | To aid |
| abeyance | A state of suspension or temporary inaction. |
| abjure | To recant |
| ablution | A washing or cleansing |
| abrogate | To abolish |
| abscond | To depart suddenly and secretly |
| abstemious | Characterized by self denial or abstinence |
| abstruse | Dealing with matters difficult to be understood. |
| abut | To touch at the end or boundary line. |
| accede | To agree. |
| acquiesce | To comply; submit. |
| acrid | Harshly pungent or bitter. |
| acumen | Quickness of intellectual insight |
| adage | An old saying. |
| adamant | Any substance of exceeding hardness or impenetrability. |
| admonition | Gentle reproof. |
| adumbrate | To represent beforehand in outline or by emblem. |
| affable | Easy to approach. |
| aggrandize | To cause to appear greatly. |
| aggravate | To make heavier |
| agile | Able to move or act quickly |
| agog | In eager desire. |
| alacrity | Cheerful willingness. |
| alcove | A covered recess connected with or at the side of a larger room. |
| alleviate | To make less burdensome or less hard to bear. |
| aloof | Not in sympathy with or desiring to associate with others. |
| amalgamate | To mix or blend together in a homogeneous body. |
| ambidextrous | Having the ability of using both hands with equal skill or ease. |
| ambiguous | Having a double meaning. |
| ameliorate | To relieve |
| anathema | Anything forbidden |
| animadversion | The utterance of criticism or censure. |
| animosity | Hatred. |
| antediluvian | Of or pertaining to the times |
| antidote | Anything that will counteract or remove the effects of poison |
| aplomb | Confidence; coolness. |
| apocryphal | Of doubtful authority or authenticity. |
| apogee | The climax. |
| apostate | False. |
| apotheosis | Deification. |
| apparition | Ghost. |
| appease | To soothe by quieting anger or indignation. |
| apposite | Appropriate. |
| apprise | To give notice to; to inform. |
| approbation | Sanction. |
| arboreal | Of or pertaining to a tree or trees. |
| ardor | Intensity of passion or affection. |
| argot | A specialized vocabulary peculiar to a particular group. |
| arrant | Notoriously bad. |
| ascetic | Given to severe self-denial and practicing excessive abstinence and devotion. |
| ascribe | To assign as a quality or attribute. |
| asperity | Harshness or roughness of temper. |
| assiduous | Unceasing; persistent |
| assuage | To cause to be less harsh |
| astringent | Harsh in disposition or character. |
| astute | Keen in discernment. |
| atonement | Amends |
| audacious | Fearless. |
| augury | Omen |
| auspicious | Favorable omen |
| austere | Severely simple; unadorned. |
| autocrat | Any one who claims or wields unrestricted or undisputed authority or influence. |
| auxiliary | One who or that which aids or helps |
| avarice | Passion for getting and keeping riches. |
| aver | To avouch |
| aversion | A mental condition of fixed opposition to or dislike of some particular thing. |
| avow | To declare openly. |