cranberry tree vs American cranberry bush

cranberry tree and American cranberry bush both are nouns.

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

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

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

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

cranberry tree (noun)	American cranberry bush (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