mat up vs matte

mat up is not a noun while matte is a noun.

Word	Noun	Adjective	Verb	Adverb
mat up	No	No	Yes	No
matte	Yes	Yes	Yes	No

As verbs, mat up and matte are synonyms defined as:

Other synonyms of mat up include felt, felt up, mat, matt-up, matte up.

mat up (noun)	matte (noun)
	the property of having little or no contrast; lacking highlights or gloss
	a mixture of sulfides that forms when sulfide metal ores are smelted

mat up (adjective)	matte (adjective)
	not reflecting light; not glossy

mat up (verb)	matte (verb)
change texture so as to become matted and felt-like	change texture so as to become matted and felt-like