mute vs dummy

mute and dummy both are nouns.

Word	Noun	Adjective	Verb	Adverb
mute	Yes	Yes	Yes	No
dummy	Yes	Yes	Yes	No

As nouns, dummy is a hyponym of mute; that is, dummy is a word with a more specific, narrower meaning than mute:

Other hyponyms of mute include silent person.

mute (noun)	dummy (noun)
a device used to soften the tone of a musical instrument	a figure representing the human form
a deaf person who is unable to speak	a cartridge containing an explosive charge but no bullet
	an ignorant or foolish person
	a person who does not talk

mute (adjective)	dummy (adjective)
expressed without speech	having the appearance of being real but lacking capacity to function
unable to speak because of hereditary deafness

mute (verb)	dummy (verb)
deaden (a sound or noise), especially by wrapping	make a dummy of