linguistic universal vs linguistics

linguistic universal and linguistics both are nouns.

Word	Noun	Adjective	Verb	Adverb
linguistic universal	Yes	No	No	No
linguistics	Yes	No	No	No

linguistic universal (noun)	linguistics (noun)
(linguistics) a grammatical rule (or other linguistic feature) that is found in all languages	the scientific study of language
	the humanistic study of language and literature