| complainant(noun, opponent, enemy, attacker, critic) |
| complainer(noun, opponent, enemy, attacker, critic) |
| defamer(noun, opponent, enemy, attacker, critic) |
| demurrer |
| detractor(noun, opponent, enemy, attacker, censor) |
| disapprover(noun, opponent, enemy, attacker, critic) |
| distruster |
| faultfinder(noun, opponent, enemy, attacker, critic) |
| fretter(noun, opponent, enemy, attacker, critic) |
| heathen(noun, unbeliever) |
| hypercritic(noun, opponent, enemy, attacker, critic) |
| maligner(noun, opponent, enemy, attacker, critic) |
| mistruster |
| 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) |
| pagan(noun, person) |
| panner(noun, opponent, enemy, attacker, critic) |
| pessimist(noun, unbeliever) |