linguistics vs uninflected

linguistics is a noun but uninflected is not a noun.

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

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

linguistics (adjective)	uninflected (adjective)
	(of the voice) not inflected
	not inflected
	expressing a grammatical category by using two or more words rather than inflection