utility vs computer science

utility and computer science both are nouns.

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

utility (noun)	computer science (noun)
the service (electric power or water or transportation) provided by a public utility	the branch of engineering science that studies (with the aid of computers) computable processes and structures
a facility composed of one or more pieces of equipment connected to or part of a structure and designed to provide a service such as heat or electricity or water or sewage disposal
the quality of being of practical use
(computer science) a program designed for general support of the processes of a computer
a company that performs a public service; subject to government regulation
(economics) a measure that is to be maximized in any situation involving choice

utility (adjective)	computer science (adjective)
used of beef; usable but inferior
capable of substituting in any of several positions on a team