| tattletale(noun, law, person, knowledge, source) |
| fink(noun, law, knowledge, slang, source) |
| informant(noun, law, person, knowledge, source) |
| informer(noun, law, person, knowledge, source) |
| snitch(noun, law, knowledge, slang, source) |
| stool pigeon(noun, law, knowledge, slang, gossip) |
| squealer(noun, law, knowledge, slang, source) |
| tattler(noun, law, person, knowledge, source) |
| stoolie(noun, law, knowledge, slang, source) |
| betrayer(source, grass, sneak, decoy, informer) |
| canary(source, gossip, grass, sneak, informer) |
| nark(source, gossip, sneak, informer) |
| snitcher(noun, law, knowledge, slang, source) |
| source(grass, sneak, decoy, informer) |
| blabbermouth(source, gossip, grass, sneak, informer) |
| deep throat(expression, source, grass, sneak, informer) |
| double-crosser(source, grass, sneak, decoy, informer) |
| fat mouth(expression, gossip, sneak, informer) |
| ratfink(gossip, sneak, informer, snake) |
| snake(sneak, informer, informant, squealer) |