document vs computer science

document and computer science both are nouns.

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

document (noun)	computer science (noun)
anything serving as a representation of a person's thinking by means of symbolic marks	the branch of engineering science that studies (with the aid of computers) computable processes and structures
writing that provides information (especially information of an official nature)
(computer science) a computer file that contains text (and possibly formatting instructions) using seven-bit ASCII characters
a written account of ownership or obligation

document (verb)	computer science (verb)
support or supply with references
record in detail