| A | B |
| Bolster | to support; to reinforce |
| Bombast | speech or writing intended to impress the audience; pompous |
| Brevity | briefness; comciseness |
| Bumptious | pushy; obnoxiously self-assertive |
| Cacophony | harshness of sound; opposite of harmony |
| Cajole | to fool with flattery or false promises; coax; deceive |
| Candor | honest; frankness |
| Capacious | large; roomy; spacious |
| Capitulate | surrender; yield |
| Capricious | unpredictable |
| Castigate | scold; punish |
| Caustic | burning; either with chemicals or sarcasm |
| Celerity | speed |
| Censure | to critize |
| Chasten | punish; discipline; castigate |
| Chastise | scold; punish; castigate |
| Choler | anger |
| Circumscribe | draw a line around; define limits; confine; restrict |
| Circumspect | cautious |
| Clemency | mercy |
| Cloister | secluded or isolated from the outside world; also, a place of seclusion |
| Coalesce | unite; grow together |
| Coerce | to force someone by threatening or physically overpowering him |
| Complacent | self-satisfied; unconcerned |
| Compliant | following someone else's demands; conforming; obeying |
| Composure | calmness; equanimity |
| Concede | admit reluctantly; yield |
| Concise | short and to the point; terse |
| Concur | agree |
| Condone | to overlook, excuse, or pardon |