informant Synonyms

source witnesser witness sources stool pigeon secret agent tipster fink testifier telltale teller tattler talebearer swearer squealer spy insider nark monitors eaves-dropper rat fink Plants notifier infiltrator deep throat Abwehr whistleblower Indic invigilator tattletale stoolie snitcher snitch sneak scout reporter earwitness dictionary denunciator denouncer compurgator complainant cojuror canaries canary betrayer authority attester annunciator agent