multiflora rose vs Japanese rose

multiflora rose and Japanese rose both are nouns.

Word	Noun	Adjective	Verb	Adverb
multiflora rose	Yes	No	No	No
Japanese rose	Yes	No	No	No

As nouns, multiflora rose and Japanese rose are synonyms defined as:

multiflora rose and Japanese rose: vigorously growing rose having clusters of numerous small flowers; used for hedges and as grafting stock

Other synonyms of multiflora rose include baby rose, multiflora, Rosa multiflora.

multiflora rose (noun)	Japanese rose (noun)
vigorously growing rose having clusters of numerous small flowers; used for hedges and as grafting stock	vigorously growing rose having clusters of numerous small flowers; used for hedges and as grafting stock