polytonalism vs polytonality

polytonalism and polytonality both are nouns.

Word	Noun	Adjective	Verb	Adverb
polytonalism	Yes	No	No	No
polytonality	Yes	No	No	No

As nouns, polytonalism and polytonality are synonyms defined as:

polytonalism and polytonality: music that uses two or more different keys at the same time

polytonalism (noun)	polytonality (noun)
music that uses two or more different keys at the same time	music that uses two or more different keys at the same time