unacceptable vs linguistics

unacceptable is not a noun while linguistics is a noun.

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

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

unacceptable (adjective)	linguistics (adjective)
not acceptable; not welcome
(used of persons or their behavior) not acceptable or reasonable
not conforming to standard usage
not adequate to give satisfaction