mouse vs mouse button

mouse and mouse button both are nouns.

Word	Noun	Adjective	Verb	Adverb
mouse	Yes	No	Yes	No
mouse button	Yes	No	No	No

mouse (noun)	mouse button (noun)
any of numerous small rodents typically resembling diminutive rats having pointed snouts and small ears on elongated bodies with slender usually hairless tails	a push button on the mouse
a hand-operated electronic device that controls the coordinates of a cursor on your computer screen as you move it around on a pad; on the bottom of the device is a ball that rolls on the surface of the pad
person who is quiet or timid
a swollen bruise caused by a blow to the eye

mouse (verb)	mouse button (verb)
manipulate the mouse of a computer
to go stealthily or furtively