baby rose vs Japanese rose

baby rose and Japanese rose both are nouns.

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

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

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

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

baby 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