computer science vs host

computer science and host both are nouns.

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

computer science (noun)	host (noun)
the branch of engineering science that studies (with the aid of computers) computable processes and structures	an animal or plant that nourishes and supports a parasite; it does not benefit and is often harmed by the association
	(computer science) a computer that provides client stations with access to files and printers as shared resources to a computer network
	a vast multitude
	any organization that provides resources and facilities for a function or event
	archaic terms for army
	the owner or manager of an inn
	a person who acts as host at formal occasions (makes an introductory speech and introduces other speakers)
	a person who invites guests to a social event (such as a party in his or her own home) and who is responsible for them while they are there
	(medicine) recipient of transplanted tissue or organ from a donor

computer science (verb)	host (verb)
	be the host of or for