grouse-berry vs grouseberry

grouse-berry and grouseberry both are nouns.

Word	Noun	Adjective	Verb	Adverb
grouse-berry	Yes	No	No	No
grouseberry	Yes	No	No	No

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

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

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

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