multiflora vs rosebush

multiflora and rosebush both are nouns.

Word	Noun	Adjective	Verb	Adverb
multiflora	Yes	No	No	No
rosebush	Yes	No	No	No

As nouns, rosebush is a hypernym of multiflora; that is, rosebush is a word with a broader meaning than multiflora:

multiflora: vigorously growing rose having clusters of numerous small flowers; used for hedges and as grafting stock
rosebush: any of many shrubs of the genus Rosa that bear roses

Other hypernyms of multiflora include rose.

multiflora (noun)	rosebush (noun)
vigorously growing rose having clusters of numerous small flowers; used for hedges and as grafting stock	any of many shrubs of the genus Rosa that bear roses