| tattler(noun, law, person, bad, knowledge) |
| snitch(noun, law, person, knowledge, slang) |
| stool pigeon(noun, expression, idiom, law, person) |
| blabbermouth(noun, source, gossip, much, sneak) |
| informer(noun, law, person, knowledge, source) |
| squealer(noun, law, person, knowledge, slang) |
| snitcher(noun, law, person, knowledge, slang) |
| stoolie(noun, law, person, knowledge, slang) |
| tipster(noun, law, person, knowledge, informal) |
| informant(noun, law, person, knowledge, source) |
| canary(noun, source, gossip, disclosure, grass) |
| betrayer(source, spy, grass, sneak, informer) |
| sneak(source, spy, gossip, grass, informer) |
| whistle-blower(source, spy, sneak, informer) |
| nark(noun, source, gossip, grass, sneak) |
| weasel(noun, source, grass, sneak, decoy) |
| accuser(source, sneak, informant, squealer) |
| announcer(source, sneak, informant, squealer) |
| crier(source, sneak, informant, squealer) |
| deceiver(source, spy, sneak, impostor) |