primitivism vs primitiveness

primitivism and primitiveness both are nouns.

Word	Noun	Adjective	Verb	Adverb
primitivism	Yes	No	No	No
primitiveness	Yes	No	No	No

As nouns, primitivism and primitiveness are synonyms defined as:

Other synonyms of primitivism include crudeness, crudity, rudeness.

primitivism (noun)	primitiveness (noun)
a genre characteristic of (or imitative of) primitive artists or children	a wild or unrefined state
a wild or unrefined state