| traitor(noun, person, knave, deserter) |
| betrayer(noun, turncoat, knave, plotter) |
| collaborator(noun, associate, assistant, accessory) |
| intriguer(noun, informer, impostor, renegade) |
| double-crosser(impostor, renegade, turncoat, hypocrite) |
| informer(noun, turncoat) |
| turncoat(noun, impostor, renegade, traitor) |
| double agent(noun, expression, turncoat) |
| renegade(noun, impostor, turncoat, hypocrite) |
| snake(impostor, renegade, turncoat, hypocrite) |
| squealer(noun, impostor, renegade, turncoat) |
| treasonist(impostor, renegade, turncoat, hypocrite) |
| whistle-blower(impostor, renegade, turncoat, hypocrite) |
| Benedict Arnold(expression, impostor, renegade, turncoat) |
| Judas(noun, impostor, renegade, turncoat) |
| apostate(impostor, renegade, turncoat, hypocrite) |
| back-stabber(impostor, renegade, turncoat, hypocrite) |
| backslider(impostor, renegade, turncoat, hypocrite) |
| deceiver(noun, informer, rat, impostor) |
| defector(noun, impostor, renegade, turncoat) |