bilberry vs Viccinium membranaceum

bilberry and Viccinium membranaceum both are nouns.

Word	Noun	Adjective	Verb	Adverb
bilberry	Yes	No	No	No
Viccinium membranaceum	Yes	No	No	No

As nouns, bilberry and Viccinium membranaceum are synonyms defined as:

bilberry and Viccinium membranaceum: erect blueberry of western United States having solitary flowers and somewhat sour berries

Other synonyms of bilberry include mountain blue berry, thin-leaved bilberry.

bilberry (noun)	Viccinium membranaceum (noun)
blue-black berries similar to American blueberries	erect blueberry of western United States having solitary flowers and somewhat sour berries
erect blueberry of western United States having solitary flowers and somewhat sour berries
erect European blueberry having solitary flowers and blue-black berries