intranet vs computer network

intranet and computer network both are nouns.

Word	Noun	Adjective	Verb	Adverb
intranet	Yes	No	No	No
computer network	Yes	No	No	No

As nouns, computer network is a hypernym of intranet; that is, computer network is a word with a broader meaning than intranet:

intranet: a restricted computer network; a private network created using World Wide Web software
computer network: (computer science) a network of computers

intranet (noun)	computer network (noun)
a restricted computer network; a private network created using World Wide Web software	(computer science) a network of computers