| slanderer(noun, opponent, enemy, attacker, critic) |
| vilifier(noun, opponent, enemy, attacker, critic) |
| defamer(noun, opponent, enemy, attacker, critic) |
| backbiter |
| libeler |
| traducer |
| attacker(noun, opponent, enemy, critic, defamer) |
| disparager(noun, opponent, enemy, attacker, critic) |
| aristarch(noun, opponent, enemy, attacker, critic) |
| asperser |
| backseat driver(noun, expression, opponent, enemy, attacker) |
| belittler(noun, opponent, enemy, attacker, critic) |
| blamer(noun, opponent, enemy, attacker, critic) |
| calumniator |
| carper(noun, opponent, enemy, attacker, critic) |
| caviler(noun, opponent, enemy, attacker, critic) |
| censor(noun, opponent, enemy, attacker, critic) |
| censurer(noun, opponent, enemy, attacker, critic) |
| complainant(noun, opponent, enemy, attacker, critic) |
| complainer(noun, opponent, enemy, attacker, critic) |