| Term | Definition |
| counterpart | a thing that complete another thing; things very much alike |
| coup | highly successful action or sudden attack |
| couple | join; unite |
| courier | messenger |
| covenant | agreement |
| covert | secret; hidden; implied |
| covetous | avaricious; eagerly desirous of |
| cow | terrorize; intimidate |
| cower | shrink quivering, as from fear |
| coy | shy; modest; coquettish |
| cozen | cheat; hoodwink; swindle |
| crabbed | sour; peevish |
| crass | very unrefined; grossly insensible |
| craven | cowardly |
| credence | belief |
| credo | creed |
| credulity | belief on slight evidence; gullibility; naivete |
| creed | system of religious or ethical belief |
| crescendo | increase in the volume or intensity, as in a musical passage; climax |
| crestfallen | dejected; dispirited |
| crevice | crack; fissure |
| cringe | shrink back, as in fear |
| criteria | standards used in judging |
| crone | hag (An ugly, withered old woman) |
| crotchety | eccentric; whimsical |
| crux | essential or main point |
| crypt | secret recess or vault usually used for burial |
| cryptic | mysterious |
| cubicle | smaller chamber used for sleeping |
| cuisine | style of cooking |
| culinary | relating to cooking |
| cull | pick out; reject |
| culmination | attainment of highest point |
| culpable | deserving blame |
| culvert | artificial channel for water |
| cumbersome | heavy; hard to manage |
| cumulative | growing by addition |
| cupidity | greed |
| curator | superintendent; manager |
| curmudgeon | churlish, misery individual; ill-tempered |
| cursive | flowing; running |
| cursory | casual; hastily done |
| curtail | shorten; reduce |
| cynical | skeptical or distrustful of human motives |
| cynosure | object of general attention |
| dabble | work at in a nonserious fashion; splash around |
| dais | raised platform for guest of honor |
| dally | trifle with ( flirt, coquette) ; procrastinate |
| damp | lessen in intensity; diminish; mute |
| dank | damp; moist; slightly wet |
| dapper | neat and trim |
| dappled | spotted; mottled; having patches of color |
| daub | smear ( as with paint) |
| daunt | intimidate; frighten |
| dauntless | bold |
| dawdle | loiter; waste time |
| deadlock | standstill; stalemate |
| deadpan | wooden; impassive; expressionless |
| dearth | scarcity |
| debacle | sudden downfall; complete disaster |
| debase | reduce the quality or value; lower in esteem; degrade |
| debauch | corrupt; seduce from virtue |
| debilitate | weaken; enfeeble |
| debonair | urbane and suave; amiable; cheerful and carefree |
| debris | rubble |
| debunk | expose as false, exaggerated, worthless, etc;ridicule |
| debutante | young woman making formal entrance into society |
| decadence | decay |
| decant | pour off gently |
| decapitate | behead |
| decelerate | slow down |