have a go at it vs vulgarism

have a go at it is not a noun while vulgarism is a noun.

Word	Noun	Adjective	Verb	Adverb
have a go at it	No	No	Yes	No
vulgarism	Yes	No	No	No

have a go at it (noun)	vulgarism (noun)
	the quality of lacking taste and refinement
	an offensive or indecent word or phrase

have a go at it (verb)	vulgarism (verb)
have sexual intercourse with