peer-to-peer vs computer science

peer-to-peer is not a noun while computer science is a noun.

Word	Noun	Adjective	Verb	Adverb
peer-to-peer	No	Yes	No	No
computer science	Yes	No	No	No

peer-to-peer (noun)	computer science (noun)
	the branch of engineering science that studies (with the aid of computers) computable processes and structures

peer-to-peer (adjective)	computer science (adjective)
Of a social network of equal partners able to conduct business without using a middle man
Of a network of two or more computers connected as equal partners and able to share processing, control and access to data and peripherals