linguistics vs linguistic performance

linguistics and linguistic performance both are nouns.

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

linguistics (noun)	linguistic performance (noun)
the scientific study of language	(linguistics) a speaker's actual use of language in real situations; what the speaker actually says, including grammatical errors and other non-linguistic features such as hesitations and other disfluencies (contrasted with linguistic competence)
the humanistic study of language and literature