fink vs stool pigeon

fink and stool pigeon both are nouns.

Word	Noun	Adjective	Verb	Adverb
fink	Yes	No	Yes	No
stool pigeon	Yes	No	No	No

As nouns, fink and stool pigeon are synonyms defined as:

fink and stool pigeon: someone acting as an informer or decoy for the police

Other synonyms of fink include canary, sneak, sneaker, snitch, snitcher, stoolie, stoolpigeon.

fink (noun)	stool pigeon (noun)
someone acting as an informer or decoy for the police	a dummy pigeon used to decoy others
	someone acting as an informer or decoy for the police

fink (verb)	stool pigeon (verb)
confess to a punishable or reprehensible deed, usually under pressure
take the place of work of someone on strike