| A | B |
| abatement | reduction; lessening |
| abbreviate | to shorten; to reduce |
| abet | to help a criminal; to assist in wrongdoing |
| abhor | to loathe or to regard with horror; to reject |
| abolition | an act of doing away with something; slavery's end in the U.S. |
| abstemious | moderate; tending to abstain from excessiveness in food and drink |
| abstract | theoretical; not concrete |
| acclaim | to clap or applaud; to praise or recognize |
| acclimated | adapted; accustomred to one's surroundings |