grouseberry vs Vaccinium scoparium

grouseberry and Vaccinium scoparium both are nouns.

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

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

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

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

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