| betrayer(noun, person, trust, source, spy) |
| traitor(noun, person, trust, rebel, spy) |
| double-dealer(noun, crook, rascal, rogue, trickster) |
| two-timer(noun, spy, impostor, renegade, turncoat) |
| Judas(noun, person, trust, spy, impostor) |
| rat(noun, person, informal, trust, source) |
| turncoat(noun, source, spy, sneak, informer) |
| quisling(noun, spy, impostor, renegade, turncoat) |
| Benedict Arnold(noun, expression, spy, informer, rat) |
| informer(noun, source, spy, grass, sneak) |
| deceiver(noun, source, spy, crook, sneak) |
| snake(rebel, spy, sneak, impostor, renegade) |
| apostate(noun, rebel, spy, impostor, renegade) |
| conniver(crook, rascal, rogue, trickster, cheater) |
| conspirator(spy, impostor, renegade, turncoat, hypocrite) |
| double agent(expression, spy, turncoat, conspirator) |
| fink(noun, source, spy, grass, sneak) |
| renegade(noun, person, rebel, spy, impostor) |
| serpent |
| snitch(noun, source, spy, grass, sneak) |