nonfunctional vs role

nonfunctional is not a noun while role is a noun.

Word	Noun	Adjective	Verb	Adverb
nonfunctional	No	Yes	No	No
role	Yes	No	No	No

nonfunctional (noun)	role (noun)
	the actions and activities assigned to or required or expected of a person or group
	normal or customary activity of a person in a particular social setting
	what something is used for
	an actor's portrayal of someone in a play

nonfunctional (adjective)	role (adjective)
not having or performing a function
not performing or able to perform its regular function