boysenberry vs boysenberry bush

boysenberry and boysenberry bush both are nouns.

Word	Noun	Adjective	Verb	Adverb
boysenberry	Yes	No	No	No
boysenberry bush	Yes	No	No	No

As nouns, boysenberry and boysenberry bush are synonyms defined as:

boysenberry and boysenberry bush: cultivated hybrid bramble of California having large dark wine-red fruit with a flavor resembling raspberries

boysenberry (noun)	boysenberry bush (noun)
large raspberry-flavored fruit; cross between blackberries and raspberries	cultivated hybrid bramble of California having large dark wine-red fruit with a flavor resembling raspberries
cultivated hybrid bramble of California having large dark wine-red fruit with a flavor resembling raspberries