Finks, noun plural of fink. Synonyms in the same form.
Snitch
canaries, narcs, sneaks, informers, blabbers, whistleblowers, tell tales, sneakers, tattletales, tattlers, squealers, blabs, betrayers, snitches, stoolies, snitchers, peachers
Rat
snakes, traitors, rats
Other
scabs
All synonyms for fink →