linguistics vs suprasegmental

linguistics is a noun but suprasegmental is not a noun.

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

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

linguistics (adjective)	suprasegmental (adjective)
	pertaining to a feature of speech that extends over more than a single speech sound