artificiality vs unnaturalness

artificiality and unnaturalness both are nouns.

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

As nouns, unnaturalness is a hypernym of artificiality; that is, unnaturalness is a word with a broader meaning than artificiality:

artificiality: the quality of being produced by people and not occurring naturally
unnaturalness: the quality of being unnatural or not based on natural principles

artificiality (noun)	unnaturalness (noun)
the quality of being produced by people and not occurring naturally	the quality of being unnatural or not based on natural principles