hoodlum vs crook

hoodlum and crook both are nouns.

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

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

hoodlum: an aggressive and violent young criminal
crook: someone who has committed a crime or has been legally convicted of a crime

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

hoodlum (noun)	crook (noun)
an aggressive and violent young criminal	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

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