| snitch(noun, verb, phrasal verb, law, knowledge) |
| rat(noun, verb, phrasal verb, law, knowledge) |
| sneak(noun, immoral, source, informer) |
| stool pigeon(noun, expression, idiom, law, knowledge) |
| informer(noun, law, person, knowledge, agent) |
| nark(noun, source, agent, gossip) |
| snake(noun, informal, sneak, informer) |
| betrayer(noun, source, grass, sneak) |
| whistle-blower(noun, source, sneak, informer) |
| traitor(noun, person, informer, rascal) |
| Benedict Arnold(noun, expression, informer, rat) |
| double-crosser(noun, source, grass, sneak) |
| eavesdropper(noun, agent, gossip, informer) |
| miscreant(noun, person, immoral, troublemaker) |
| snoop(noun, agent, gossip, nuisance) |
| turncoat(noun, source, grass, sneak) |
| Judas(impostor, renegade, turncoat, hypocrite) |
| Sherlock Holmes(expression, agent, informer, reporter) |
| agent(informer, reporter, gumshoe, investigator) |
| analyst(agent, informer, reporter, gumshoe) |