abnormal vs deviant

abnormal is not a noun while deviant is a noun.

Word	Noun	Adjective	Verb	Adverb
abnormal	No	Yes	No	No
deviant	Yes	Yes	No	No

abnormal (noun)	deviant (noun)
	a person whose behavior deviates from what is acceptable especially in sexual behavior

abnormal (adjective)	deviant (adjective)
not normal; not typical or usual or regular or conforming to a norm	markedly different from an accepted norm
departing from the normal in e.g. intelligence and development
much greater than the normal