hypermedia vs multimedia system

hypermedia and multimedia system both are nouns.

Word	Noun	Adjective	Verb	Adverb
hypermedia	Yes	No	No	No
multimedia system	Yes	No	No	No

As nouns, multimedia system is a hypernym of hypermedia; that is, multimedia system is a word with a broader meaning than hypermedia:

hypermedia: a multimedia system in which related items of information are connected and can be presented together
multimedia system: transmission that combine media of communication (text and graphics and sound etc.)

Other hypernyms of hypermedia include multimedia.

hypermedia (noun)	multimedia system (noun)
a multimedia system in which related items of information are connected and can be presented together	transmission that combine media of communication (text and graphics and sound etc.)