religiosity vs religiousism

religiosity and religiousism both are nouns.

Word	Noun	Adjective	Verb	Adverb
religiosity	Yes	No	No	No
religiousism	Yes	No	No	No

As nouns, religiosity and religiousism are synonyms defined as:

religiosity and religiousism: exaggerated or affected piety and religious zeal

Other synonyms of religiosity include pietism, religionism.

religiosity (noun)	religiousism (noun)
exaggerated or affected piety and religious zeal	exaggerated or affected piety and religious zeal