grouse whortleberry vs Vaccinium scoparium

grouse whortleberry and Vaccinium scoparium both are nouns.

Word	Noun	Adjective	Verb	Adverb
grouse whortleberry	Yes	No	No	No
Vaccinium scoparium	Yes	No	No	No

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

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

Other synonyms of grouse whortleberry include grouse-berry, grouseberry.

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