peripheral vs computer science

peripheral and computer science both are nouns.

Word	Noun	Adjective	Verb	Adverb
peripheral	Yes	Yes	No	No
computer science	Yes	No	No	No

peripheral (noun)	computer science (noun)
electronic equipment external to the circuit board that contains the CPU of a computer	the branch of engineering science that studies (with the aid of computers) computable processes and structures

peripheral (adjective)	computer science (adjective)
on or near an edge or constituting an outer boundary; the outer area
related to the key issue but not of central importance