vulgarism vs vulgarity

vulgarism and vulgarity both are nouns.

Word	Noun	Adjective	Verb	Adverb
vulgarism	Yes	No	No	No
vulgarity	Yes	No	No	No

As nouns, vulgarism and vulgarity are synonyms defined as:

Other synonyms of vulgarism include coarseness, commonness, grossness, raunch.

vulgarism (noun)	vulgarity (noun)
the quality of lacking taste and refinement	the quality of lacking taste and refinement
an offensive or indecent word or phrase