| A | B |
|---|
| accessory | something additional |
| acclaim | to greet with approval |
| acclimate | to adapt; to get used to |
| acclivity | upward slope |
| accolade | honor; award; approval |
| accommodate | to make fit; to help |
| accomplice | a partner in crime |
| accord | an agreement |
| accost | to approach and speak to |
| accoutrement | equipment; outfit |
| accredit | to approve; to certify |
| accretion | an increase; an addition |
| accrue | to gather; to accumulate |
| acerbic | sharp or bitter in smell taste |
| Achilles' heel | a weakness |
| acknowledge | to admit; to confess |
| acme | highest point; peak |
| acoustics | branch of physics dealing with sound |
| acquiesce | to agree; to consent |
| acquit | to free of guilt; to clear |
| acrid | bitter to the taste or smell; sarcastic |
| acrimonious | harsh in speech or behavior |
| acronym | word formed from initials |
| acrophobia | fear of heights |
| actuate | to put into motion or action |
| acumen | mental keenness; shrewdness |
| acute | sharp; keen |
| ad infinitum | endlessly; forever |
| ad lib | to act or speak without preparation |
| adage | a familiar saying |
| adamant | stubborn; unyielding |
| adapt | to adjust; to change |
