informer Synonyms

rat squealer blabber betrayer scab testifier traitor turncoat weasel whistler fink tipster secret agent Benedict Arnold telltale tattler sleeper sleuth sneak source spy squeaker swearer talebearer taleteller oriental cockroach snake in the grass stool pigeon whistleblower backstabber defector double agent infiltrator notifier Saluki Sherlock Holmes shoofly songbird scandalmonger Indic double-crosser nark snitch snitcher stoolie blabbermouth tattletale gossipmonger rumormonger narc