primitiveness vs primitivism

primitiveness and primitivism both are nouns.

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

As nouns, primitiveness and primitivism are synonyms defined as:

Other synonyms of primitiveness include crudeness, crudity, rudeness.

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