linguistics vs acceptable

linguistics is a noun but acceptable is not a noun.

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

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

linguistics (adjective)	acceptable (adjective)
	worthy of acceptance or satisfactory
	adequate for the purpose
	meeting requirements
	judged to be in conformity with approved usage