| maligner(noun, opponent, enemy, attacker, critic) |
| muckraker(noun, opponent, enemy, attacker, critic) |
| mud-slinger(noun, opponent, enemy, attacker, critic) |
| nagger(noun, opponent, enemy, attacker, critic) |
| nit-picker(noun, opponent, enemy, attacker, critic) |
| panner(noun, opponent, enemy, attacker, critic) |
| quibbler(noun, opponent, enemy, attacker, critic) |
| rejector |
| reviler(noun, opponent, enemy, attacker, critic) |
| scolder(noun, opponent, enemy, attacker, critic) |
| sidewalk superintendent(noun, expression, opponent, enemy, attacker) |
| slanderer(noun, opponent, enemy, attacker, critic) |
| vilifier(noun, opponent, enemy, attacker, critic) |
| worrier(noun, opponent, enemy, attacker, critic) |
| zapper(noun, opponent, enemy, attacker, critic) |
| criticizer(noun, opponent, enemy, attacker, critic) |
| demurrer |
| denouncer |
| deprecater |
| detractor(noun, opponent, enemy, attacker, critic) |