waste matter vs waste material

waste matter and waste material both are nouns.

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

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

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

Other synonyms of waste matter include waste, waste product.

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