dewberry bush vs dewberry

dewberry bush and dewberry both are nouns.

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

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

dewberry bush and dewberry: any of several trailing blackberry brambles especially of North America

Other synonyms of dewberry bush include running blackberry.

dewberry bush (noun)	dewberry (noun)
any of several trailing blackberry brambles especially of North America	blackberry-like fruits of any of several trailing blackberry bushes
	any of several trailing blackberry brambles especially of North America