| traitor(noun, person, opposition, trust, agent) |
| informer(noun, opposition, source, agent, villain) |
| double-crosser(noun, person, trust, source) |
| squealer(noun, source, grass, sneak) |
| turncoat(noun, source, sneak, informer) |
| two-timer(noun, turncoat, conspirator) |
| snitch(noun, source, grass, sneak) |
| Judas(noun, person, trust, decoy) |
| renegade(noun, person, rebel, criminal) |
| Benedict Arnold(noun, expression, informer, rat) |
| conspirator(noun, turncoat, knave, plotter) |
| deserter(noun, rebel, fugitive, turncoat) |
| fink(noun, source, grass, sneak) |
| quisling(noun, turncoat, traitor, conspirator) |
| snitcher(noun, source, grass, sneak) |
| defector(noun, rebel, criminal, turncoat) |
| double agent(noun, expression, turncoat, conspirator) |
| snake(rebel, sneak, informant, squealer) |
| tattletale(source, grass, sneak, informer) |
| whistle-blower(source, grass, sneak, informer) |