| sneak(noun, source, spy, grass, informer) |
| snitch(noun, law, knowledge, slang, source) |
| stool pigeon(noun, expression, law, knowledge, slang) |
| tattletale(noun, law, person, knowledge, source) |
| canary(noun, source, gossip, grass, sneak) |
| fink(noun, law, knowledge, slang, source) |
| informer(noun, law, person, knowledge, source) |
| stoolie(noun, law, knowledge, slang, source) |
| pilferer |
| sneaker |
| squealer(noun, law, knowledge, slang, source) |
| stoolpigeon |
| betrayer(noun, source, spy, grass, sneak) |
| sneak thief(noun, expression, idiom) |
| tattler(noun, law, person, knowledge, source) |
| blabber |
| blabbermouth(noun, source, gossip, grass, sneak) |
| informant(noun, law, person, knowledge, source) |
| whistle-blower(source, spy, grass, sneak, informer) |
| blab(sneak, informer, snake, informant, squealer) |