| spy(noun, person, information, plant, opposition) |
| betrayer(noun, opposition, source, agent, villain) |
| squealer(noun, law, person, knowledge, slang) |
| stoolie(noun, law, person, knowledge, slang) |
| fink(noun, law, person, knowledge, slang) |
| snitch(noun, law, person, knowledge, slang) |
| nark(noun, source, agent, spy, gossip) |
| sneak(noun, person, source, spy, gossip) |
| tattletale(noun, law, person, knowledge, source) |
| traitor(noun, person, opposition, agent, villain) |
| informant(noun, law, person, knowledge, source) |
| stool pigeon(noun, expression, idiom, law, person) |
| tattler(noun, law, person, knowledge, source) |
| telltale(noun, gossip, canary, snitch) |
| canary(noun, source, gossip, grass, sneak) |
| talebearer(noun, gossip, canary, tattle) |
| weasel(noun, source, grass, sneak, decoy) |
| blabbermouth(noun, source, gossip, sneak, reporter) |
| snake(noun, spy, sneak, reporter) |
| source(noun, grass, sneak, decoy, rascal) |