polyphonic music vs polyphony

polyphonic music and polyphony both are nouns.

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

As nouns, polyphonic music and polyphony are synonyms defined as:

polyphonic music and polyphony: music arranged in parts for several voices or instruments

Other synonyms of polyphonic music include concerted music.

polyphonic music (noun)	polyphony (noun)
music arranged in parts for several voices or instruments	music arranged in parts for several voices or instruments