| fink(noun, spy, informer, rat, impostor) |
| renegade(noun, spy, impostor, turncoat, hypocrite) |
| spy(noun, informer, rat, turncoat, traitor) |
| back-stabber(spy, impostor, renegade, turncoat, hypocrite) |
| conspirator(spy, impostor, renegade, turncoat, hypocrite) |
| deceiver(spy, informer, rat, impostor, renegade) |
| hypocrite(spy, impostor, renegade, turncoat, conspirator) |
| snake in the grass(noun, traitor) |
| tattletale(spy, impostor, renegade, turncoat, hypocrite) |
| whistle-blower(spy, impostor, renegade, turncoat, hypocrite) |
| wolf(spy, impostor, renegade, turncoat, hypocrite) |
| collaborator(spy, turncoat, conspirator) |
| narc(informer, rat, traitor) |
| nark(informer, rat, traitor) |
| Brutus(noun, spy, traitor) |
| apostate(noun, spy, informer, impostor, renegade) |
| backslider(noun, spy, impostor, renegade, turncoat) |
| fifth-columnist |
| snake(spy, impostor, renegade, turncoat, hypocrite) |
| snitch(noun, spy, informer, rat, impostor) |