| A | B |
| connoisseur | beginner, novice, neophyte |
| consensus | discord, disagreement, disunity |
| construe | misinterpret, misunderstand |
| consummate | mediocre, indifferent, initiate |
| copious | meager, scanty, vacuous |
| corpulent | lean, lanky, wiry |
| corroborate | contradict, refute, discredit |
| credibility | unreliability, undependability |
| crucial | insignificant, unimportant, inconsequential |
| culpable | innocent, blameless, laudable |
| cursory | thorough, exhaustive, comprehensive |
| curtail | increase, enlarge, augment |
| cynical | optimistic, sanguine, idealistic |
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