felon vs crook

felon and crook both are nouns.

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

As nouns, felon and crook are synonyms defined as:

felon and crook: someone who has committed a crime or has been legally convicted of a crime

Other synonyms of felon include criminal, malefactor, outlaw.

felon (noun)	crook (noun)
someone who has committed a crime or has been legally convicted of a crime	a long staff with one end being hook shaped
a purulent infection at the end of a finger or toe in the area surrounding the nail	someone who has committed a crime or has been legally convicted of a crime
	a circular segment of a curve

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