Vaccinium scoparium vs grouse-berry

Vaccinium scoparium and grouse-berry both are nouns.

Word	Noun	Adjective	Verb	Adverb
Vaccinium scoparium	Yes	No	No	No
grouse-berry	Yes	No	No	No

As nouns, Vaccinium scoparium and grouse-berry are synonyms defined as:

Vaccinium scoparium and grouse-berry: shrub of northwestern North America bearing red berries

Other synonyms of Vaccinium scoparium include grouse whortleberry, grouseberry.

Vaccinium scoparium (noun)	grouse-berry (noun)
shrub of northwestern North America bearing red berries	shrub of northwestern North America bearing red berries