snitcher

a person who provides information about another's wrongdoing the prison inmate swore that he'd get revenge if he ever found out who the snitcher was Synonyms betrayer, canary [slang], deep throat, fink, informant, nark [British], rat, rat fink, snitch, informer, squealer, stoolie, stool pigeon, talebearer, tattler, tattletale, telltale, whistle-blowerRelated Words collaborator; blabber, blabbermouth, gossip, gossiper, leaker; snoop, snooper, spy; notifier