computer science vs execution

computer science and execution both are nouns.

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

computer science (noun)	execution (noun)
the branch of engineering science that studies (with the aid of computers) computable processes and structures	putting a condemned person to death
	unlawful premeditated killing of a human being by a human being
	the act of performing; of doing something successfully; using knowledge as distinguished from merely possessing it
	the act of accomplishing some aim or executing some order
	a routine court order that attempts to enforce the judgment that has been granted to a plaintiff by authorizing a sheriff to carry it out
	(law) the completion of a legal instrument (such as a contract or deed) by signing it (and perhaps sealing and delivering it) so that it becomes legally binding and enforceable
	(computer science) the process of carrying out an instruction by a computer