Vaccinium scoparium vs grouseberry

Vaccinium scoparium and grouseberry both are nouns.

Word	Noun	Adjective	Verb	Adverb
Vaccinium scoparium	Yes	No	No	No
grouseberry	Yes	No	No	No

As nouns, Vaccinium scoparium and grouseberry are synonyms defined as:

Vaccinium scoparium and grouseberry: shrub of northwestern North America bearing red berries

Other synonyms of Vaccinium scoparium include grouse-berry, grouse whortleberry.

Vaccinium scoparium (noun)	grouseberry (noun)
shrub of northwestern North America bearing red berries	shrub of northwestern North America bearing red berries