grouse-berry vs blueberry

grouse-berry and blueberry both are nouns.

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

As nouns, blueberry is a hypernym of grouse-berry; that is, blueberry is a word with a broader meaning than grouse-berry:

grouse-berry: shrub of northwestern North America bearing red berries
blueberry: any of numerous shrubs of the genus Vaccinium bearing blueberries

Other hypernyms of grouse-berry include blueberry bush.

grouse-berry (noun)	blueberry (noun)
shrub of northwestern North America bearing red berries	sweet edible dark-blue berries of either low-growing or high-growing blueberry plants
	any of numerous shrubs of the genus Vaccinium bearing blueberries