unnatural vs unnaturalness

unnatural is not a noun while unnaturalness is a noun.

Word	Noun	Adjective	Verb	Adverb
unnatural	No	Yes	No	No
unnaturalness	Yes	No	No	No

unnatural (noun)	unnaturalness (noun)
	the quality of being unnatural or not based on natural principles

unnatural (adjective)	unnaturalness (adjective)
not in accordance with or determined by nature; contrary to nature
not normal; not typical or usual or regular or conforming to a norm
speaking or behaving in an artificial way to make an impression