| competition(noun, opponent, enemy, adversary, foe) |
| emulator(noun, law, opponent, enemy, attacker) |
| denier |
| vilifier(noun, associate, attacker, competitor, adversary) |
| archenemy(noun, attacker, competitor, adversary, defamer) |
| bad person(noun, expression, ally, attacker, competitor) |
| disparager(noun, defamer, traducer, slanderer, belittler) |
| faultfinder(noun, opponent, enemy, adversary, foe) |
| other side(noun, expression, associate, attacker, competitor) |
| deserter(noun, attacker, competitor, adversary, detractor) |
| attacker(noun, competitor, adversary, detractor, antagonist) |
| condemner(noun, attacker, competitor, adversary, detractor) |
| cynic(noun, attacker, competitor, adversary, detractor) |
| dissenter(noun, attacker, competitor, adversary, detractor) |
| renegade(noun, attacker, competitor, adversary, detractor) |
| abandoner(noun, attacker, competitor, adversary, detractor) |
| asperser(noun, associate, attacker, competitor, adversary) |
| assailer(noun, attacker, competitor, adversary, detractor) |
| betrayer(noun, attacker, competitor, adversary, detractor) |
| calumniator(noun, associate, attacker, competitor, adversary) |