polyphonic vs music

polyphonic is not a noun while music is a noun.

Word	Noun	Adjective	Verb	Adverb
polyphonic	No	Yes	No	No
music	Yes	No	No	No

polyphonic (noun)	music (noun)
	musical activity (singing or whistling etc.)
	punishment for one's actions
	any agreeable (pleasing and harmonious) sounds
	(music) the sounds produced by singers or musical instruments (or reproductions of such sounds)
	an artistic form of auditory communication incorporating instrumental or vocal tones in a structured and continuous manner

polyphonic (adjective)	music (adjective)
having two or more independent but harmonically related melodic parts sounding together
of or relating to or characterized by polyphony
having two or more phonetic values