waste material vs waste matter

waste material and waste matter both are nouns.

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

As nouns, waste material and waste matter are synonyms defined as:

waste material and waste matter: any materials unused and rejected as worthless or unwanted

Other synonyms of waste material include waste, waste product.

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