vulgarity vs grossness

vulgarity and grossness both are nouns.

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

As nouns, vulgarity and grossness are synonyms defined as:

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

vulgarity (noun)	grossness (noun)
the quality of lacking taste and refinement	the quality of lacking taste and refinement