| squealer(noun, law, knowledge, slang, gossip) |
| stoolie(noun, law, knowledge, catch, slang) |
| fink(noun, law, knowledge, slang, spy) |
| canary(noun, source, gossip, grass, sneak) |
| snitch(noun, law, knowledge, slang, spy) |
| snitcher(noun, law, knowledge, slang, spy) |
| spy(noun, grass, sneak, decoy, informer) |
| informer(noun, law, person, knowledge, source) |
| tattletale(noun, law, person, knowledge, source) |
| sneak(noun, source, spy, gossip, informer) |
| informant(noun, law, person, knowledge, source) |
| tattler(noun, law, person, knowledge, source) |
| tipster(noun, law, knowledge, informal, gossip) |
| betrayer(noun, source, spy, grass, sneak) |
| narc(noun, source, grass, sneak, informer) |
| nark(noun, catch, trap, gossip, bait) |
| blabbermouth(noun, source, gossip, grass, sneak) |
| whistle-blower(noun, source, spy, grass, sneak) |
| deep throat(noun, expression, source, grass, sneak) |
| source(noun, grass, sneak, decoy, informer) |