sneaker vs stool pigeon

sneaker and stool pigeon both are nouns.

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

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

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

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

sneaker (noun)	stool pigeon (noun)
a canvas shoe with a pliable rubber sole	a dummy pigeon used to decoy others
someone acting as an informer or decoy for the police	someone acting as an informer or decoy for the police