waste matter vs filth

waste matter and filth both are nouns.

Word	Noun	Adjective	Verb	Adverb
waste matter	Yes	No	No	No
filth	Yes	No	No	No

As nouns, filth is a hyponym of waste matter; that is, filth is a word with a more specific, narrower meaning than waste matter:

waste matter (noun)	filth (noun)
any materials unused and rejected as worthless or unwanted	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