cranberry bush vs cranberry tree

cranberry bush and cranberry tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
cranberry bush	Yes	No	No	No
cranberry tree	Yes	No	No	No

As nouns, cranberry bush and cranberry tree are synonyms defined as:

cranberry bush and cranberry tree: deciduous North American shrub or small tree having three-lobed leaves and red berries

Other synonyms of cranberry bush include American cranberry bush, highbush cranberry, Viburnum trilobum.

cranberry bush (noun)	cranberry tree (noun)
deciduous North American shrub or small tree having three-lobed leaves and red berries	deciduous North American shrub or small tree having three-lobed leaves and red berries
	deciduous thicket-forming Old World shrub with clusters of white flowers and small bright red berries