European blueberry vs bilberry

European blueberry and bilberry both are nouns.

Word	Noun	Adjective	Verb	Adverb
European blueberry	Yes	No	No	No
bilberry	Yes	No	No	No

As nouns, European blueberry and bilberry are synonyms defined as:

European blueberry and bilberry: blue-black berries similar to American blueberries

Other synonyms of European blueberry include whortleberry.

European blueberry (noun)	bilberry (noun)
blue-black berries similar to American blueberries	blue-black berries similar to American blueberries
	erect blueberry of western United States having solitary flowers and somewhat sour berries
	erect European blueberry having solitary flowers and blue-black berries