gaolbird vs crook

gaolbird and crook both are nouns.

Word	Noun	Adjective	Verb	Adverb
gaolbird	Yes	No	No	No
crook	Yes	No	Yes	No

As nouns, crook is a hypernym of gaolbird; that is, crook is a word with a broader meaning than gaolbird:

gaolbird: a criminal who has been jailed repeatedly
crook: someone who has committed a crime or has been legally convicted of a crime

Other hypernyms of gaolbird include criminal, felon, malefactor, outlaw.

gaolbird (noun)	crook (noun)
a criminal who has been jailed repeatedly	a long staff with one end being hook shaped
	someone who has committed a crime or has been legally convicted of a crime
	a circular segment of a curve

gaolbird (verb)	crook (verb)
	bend or cause to bend