informer Synonyms

rat grass stool pigeon traitor turncoat mole tattletale tipster snitch informant whistleblower spy squealer blabber betrayer source secret agent Benedict Arnold sneak oriental cockroach sleuth talebearer fink whistler squeaker weasel testifier tattler swearer taleteller telltale snake in the grass double-crosser defector double agent infiltrator notifier Saluki Sherlock Holmes shoofly songbird whistle blower witness for the prosecution state witness backstabber nark snitcher stoolie blabbermouth gossipmonger