profanity vs vulgarism

profanity and vulgarism both are nouns.

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

As nouns, vulgarism is a hyponym of profanity; that is, vulgarism is a word with a more specific, narrower meaning than profanity:

Other hyponyms of profanity include blasphemy, dirty word, filth, obscenity, smut, curse, curse word, cuss, expletive, oath, swearing, swearword.

profanity (noun)	vulgarism (noun)
vulgar or irreverent speech or action	the quality of lacking taste and refinement
	an offensive or indecent word or phrase