highbush cranberry vs American cranberry bush

highbush cranberry and American cranberry bush both are nouns.

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

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

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

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

highbush cranberry (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