| A | B |
| consensus | noun; a general agreement or opinion; a majority opinion |
| consonant | adjective or noun; in agreement or in accord; harmonious; any letter of the alphabet that is not a vowel |
| contraband | noun; smuggled goods |
| contrition | noun; remorse for wrongdoing; repentance |
| convivial | adjective; fond of eating and drinking; festive |
| correlate | noun or verb; something that follows once something else has been proven; a natural consequence; to bring or put into complementary relation to each other; to relate |
| credence | noun; a belief; an acceptance as valid or true |
| debacle | noun; a sudden collapse or overthrow |
| debonair | adjective; graceful; charming |
| decadence | noun; a process, condition, or period of decline or decay; deterioration; moral decay |