| collaborator(noun, person, spy, partner, colleague) |
| traitor(noun, person, spy, disobedience, turncoat) |
| collaborationist |
| betrayer(noun, spy, turncoat, traitor, conspirator) |
| double-crosser(noun, spy, impostor, renegade, turncoat) |
| renegade(noun, spy, disobedience, impostor, turncoat) |
| turncoat(noun, spy, impostor, renegade, traitor) |
| rat(person, behavior, traitor, betrayer) |
| Judas(noun, spy, impostor, renegade, turncoat) |
| defector(noun, spy, impostor, renegade, turncoat) |
| deserter(noun, spy, impostor, renegade, turncoat) |
| recreant |
| two-timer(noun, spy, impostor, renegade, turncoat) |
| Benedict Arnold(noun, expression, spy, impostor, renegade) |
| subversive(noun, adjective) |
| apostate(spy, impostor, renegade, turncoat, hypocrite) |
| backslider(spy, impostor, renegade, turncoat, hypocrite) |
| cooperator |
| deceiver(spy, impostor, renegade, turncoat, hypocrite) |
| desperado |