| informer(noun, law, person, knowledge, source) |
| snitch(noun, law, knowledge, slang, source) |
| fink(noun, law, knowledge, slang, source) |
| betrayer(noun, source, spy, grass, sneak) |
| stool pigeon(noun, expression, idiom, law, knowledge) |
| stoolie(noun, law, knowledge, slang, source) |
| tattletale(noun, law, person, knowledge, source) |
| canary(noun, source, gossip, sneak, informer) |
| nark(noun, source, gossip, sneak, informer) |
| tattler(noun, law, person, knowledge, source) |
| snitcher(noun, law, knowledge, slang, source) |
| blabbermouth(noun, source, gossip, much, informer) |
| informant(noun, law, person, knowledge, source) |
| tipster(noun, law, knowledge, informal, source) |
| sneak(noun, source, spy, gossip, grass) |
| weasel(noun, source, grass, sneak, informer) |
| whistle-blower(source, spy, grass, sneak, informer) |
| narc(source, grass, sneak, decoy, informer) |
| telltale(gossip, sneak, informer, canary) |
| deceiver(source, spy, sneak, impostor) |