violator vs crook

violator and crook both are nouns.

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

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

violator: someone who violates the law
crook: someone who has committed a crime or has been legally convicted of a crime

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

violator (noun)	crook (noun)
someone who assaults others sexually	a long staff with one end being hook shaped
someone who violates the law	someone who has committed a crime or has been legally convicted of a crime
	a circular segment of a curve

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