| A | B |
| abase | lower; humiliate |
| abate | subside; decrease; lessen |
| abdicate | renounce; give up |
| aberration | deviation from the expected or the normal; mental irregularity or disorder |
| abet | encourage; aid |
| abeyance | suspended action |
| abject | hopeless and crushed; servile and spiritless; wretched |
| abrade | wear away by friction; scrape; erode |
| abscond | depart secretly to avoid capture |
| absolute | complete; totally unlimited; certain |
| absolve | pardon (an offense); free from blame |
| abstain | refrain; hold oneself back voluntarily from an action or practice (especially one regarded as improper or unhealthy) |
| abstract | theoretical; not concrete; nonrepresentational |
| abstruse | obscure; profound; difficult to understand |
| accelerate | move faster |
| accessible | easy to approach; obtainable |
| accessory | additional object; useful but not essential thing |
| acclaim | applaud; announce with great approval |
| accolade | award of merit |
| accommodate | provide lodgings; oblige or help someone; adjust or bring into harmony; adapt |