drug dealer vs crook

drug dealer and crook both are nouns.

Word	Noun	Adjective	Verb	Adverb
drug dealer	Yes	No	No	No
crook	Yes	No	Yes	No

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

drug dealer: an unlicensed dealer in illegal drugs
crook: someone who has committed a crime or has been legally convicted of a crime

Other hypernyms of drug dealer include criminal, felon, malefactor, outlaw, dealer.

drug dealer (noun)	crook (noun)
an unlicensed dealer in illegal drugs	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

drug dealer (verb)	crook (verb)
	bend or cause to bend