polyphonic vs linguistics

polyphonic is not a noun while linguistics is a noun.

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

polyphonic (noun)	linguistics (noun)
	the scientific study of language
	the humanistic study of language and literature

polyphonic (adjective)	linguistics (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