| caustic(adjective, mean, evil, sharp, nasty) |
| caviling(mean, nervous, irritable, worried, critical) |
| changeable(adjective, passionate, unstable, unpredictable, unreliable) |
| cheesy |
| chill(adjective, mean, nasty, unfriendly, hateful) |
| clashing(negative, hostile, different, contrary, adverse) |
| clownish(adjective, rough, rude, coarse, awkward) |
| clumsy(adjective, rough, rude, coarse, awkward) |
| coarse(adjective, rough, rude, awkward, polite) |
| common |
| competitive(adjective, mean, nasty, unfriendly, hateful) |
| complaining(mean, nervous, irritable, worried, critical) |
| con(counter, antagonistic, contrary, conflicting, incompatible) |
| conflicting(negative, hostile, unfriendly, antagonistic, contrary) |
| confrontational(difficult, hostile, irritable, antagonistic, contrary) |
| contrapositive(adjective, reverse, antagonistic, contrary, adverse) |
| contrariant(negative, hostile, different, adverse, conflicting) |
| contrasted |
| contumelious(adjective, mean, evil, sharp, nasty) |
| converse(negative, hostile, counter, different, contrary) |