fink vs squealer

fink and squealer both are nouns.

Word	Noun	Adjective	Verb	Adverb
fink	Yes	No	Yes	No
squealer	Yes	No	No	No

As nouns, squealer is a hypernym of fink; that is, squealer is a word with a broader meaning than fink:

fink: someone acting as an informer or decoy for the police
squealer: one who reveals confidential information to the police or other authority

Other hypernyms of fink include betrayer, blabber, informer, rat.

fink (noun)	squealer (noun)
someone acting as an informer or decoy for the police	domestic swine
	one who reveals confidential information to the police or other authority

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