| aristarch(noun, opponent, enemy, attacker, critic) |
| backseat driver(noun, expression, opponent, enemy, attacker) |
| belittler(noun, opponent, enemy, attacker, critic) |
| blamer(noun, opponent, enemy, attacker, critic) |
| chicaner |
| commentator |
| complainant(noun, opponent, enemy, attacker, critic) |
| connoisseur |
| cynic(noun, detractor, nonbeliever) |
| disapprover(noun, opponent, enemy, attacker, critic) |
| disparager(noun, opponent, enemy, attacker, critic) |
| disputer(noun, opponent, enemy, attacker, critic) |
| doubter(noun, opponent, enemy, attacker, critic) |
| fretter(noun, opponent, enemy, attacker, critic) |
| maligner(noun, opponent, enemy, attacker, critic) |
| mud-slinger(noun, opponent, enemy, attacker, critic) |
| nit-picker(noun, opponent, enemy, attacker, critic) |
| panner(noun, opponent, enemy, attacker, critic) |
| reviewer |
| scolder(noun, opponent, enemy, attacker, critic) |