polyphonous vs polyphonic

polyphonous and polyphonic both are adjectives.

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

As adjectives, polyphonous and polyphonic are synonyms defined as:

polyphonous and polyphonic: of or relating to or characterized by polyphony

polyphonous (adjective)	polyphonic (adjective)
of or relating to or characterized by polyphony	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