| rival(noun, person, bad, unknown, enemy) |
| opponent(noun, person, bad, unknown, enemy) |
| adversary(noun, bad, unknown, enemy) |
| betrayer(noun, awful, traitor, bad person) |
| opposer(noun, bad, unknown, enemy) |
| outsider(noun, bad, unknown, enemy) |
| recreant(noun, traitor, bad person) |
| contender(noun, bad, unknown, enemy) |
| detractor(noun, bad, unknown, enemy) |
| opposite(noun, hostile, ally, antagonist) |
| rat(noun, friend, buddy, comrade) |
| reverse(noun, hostile, ally, antagonist) |
| abjurer(noun, traitor, bad person) |
| apostate(noun, traitor, bad person) |
| backstabber(noun, traitor, bad person) |
| cain(noun, traitor, bad person) |
| cat-in-the-pan(noun, traitor, bad person) |
| cat in the pan(noun, traitor, bad person) |
| cheater(noun, traitor, bad person) |
| defector(noun, traitor, bad person) |