overwrite vs computer science

overwrite is not a noun while computer science is a noun.

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

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

overwrite (verb)	computer science (verb)
write new data on top of existing data and thus erase the previously existing data