alpine bearberry vs black bearberry

alpine bearberry and black bearberry both are nouns.

Word	Noun	Adjective	Verb	Adverb
alpine bearberry	Yes	No	No	No
black bearberry	Yes	No	No	No

As nouns, alpine bearberry and black bearberry are synonyms defined as:

alpine bearberry and black bearberry: deciduous creeping shrub bright red in autumn having black or blue-black berries; alpine and circumpolar

Other synonyms of alpine bearberry include Arctostaphylos alpina.

alpine bearberry (noun)	black bearberry (noun)
deciduous creeping shrub bright red in autumn having black or blue-black berries; alpine and circumpolar	deciduous creeping shrub bright red in autumn having black or blue-black berries; alpine and circumpolar