mat up vs matt-up

mat up and matt-up both are verbs.

Word	Noun	Adjective	Verb	Adverb
mat up	No	No	Yes	No
matt-up	No	No	Yes	No

As verbs, mat up and matt-up are synonyms defined as:

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

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