whortleberry vs European blueberry

whortleberry and European blueberry both are nouns.

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

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

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

Other synonyms of whortleberry include bilberry.

whortleberry (noun)	European blueberry (noun)
blue-black berries similar to American blueberries	blue-black berries similar to American blueberries
erect European blueberry having solitary flowers and blue-black berries