have a go at it vs filth

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

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

have a go at it (noun)	filth (noun)
	an offensive or indecent word or phrase
	a state characterized by foul or disgusting dirt and refuse
	anything regarded as making something unclean
	any substance considered disgustingly foul or unpleasant

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