informers

accuser adviser announcer betrayer blabbermouth canary crier deep throat double-crosser herald interviewer journalist messenger newscaster/newsperson notifier preacher propagandist rat reporter sneak source stool pigeon tattler tattletale

announcer

accuser adviser betrayer blabbermouth canary crier double-crosser finger fink herald interviewer journalist messenger nark newsman preacher propagandist rat singer snake sneak snitcher songbird source squealer stoolie tattler tattletale tipster weasel

blab deep throat fat mouth fork tongue notifier ratfink stool pigeon