counterpoint vs polyphony

counterpoint and polyphony both are nouns.

Word	Noun	Adjective	Verb	Adverb
counterpoint	Yes	No	Yes	No
polyphony	Yes	No	No	No

As nouns, polyphony is a hypernym of counterpoint; that is, polyphony is a word with a broader meaning than counterpoint:

counterpoint: a musical form involving the simultaneous sound of two or more melodies
polyphony: music arranged in parts for several voices or instruments

Other hypernyms of counterpoint include concerted music, polyphonic music.

counterpoint (noun)	polyphony (noun)
a musical form involving the simultaneous sound of two or more melodies	music arranged in parts for several voices or instruments

counterpoint (verb)	polyphony (verb)
write in counterpoint
to show differences when compared; be different