mouse mat vs mousepad

mouse mat and mousepad both are nouns.

Word	Noun	Adjective	Verb	Adverb
mouse mat	Yes	No	No	No
mousepad	Yes	No	No	No

As nouns, mouse mat and mousepad are synonyms defined as:

mouse mat and mousepad: a small portable pad that provides traction for the ball of a computer mouse

mouse mat (noun)	mousepad (noun)
a small portable pad that provides traction for the ball of a computer mouse	a small portable pad that provides traction for the ball of a computer mouse