common elder vs European elder

common elder and European elder both are nouns.

Word	Noun	Adjective	Verb	Adverb
common elder	Yes	No	No	No
European elder	Yes	No	No	No

As nouns, common elder and European elder are synonyms defined as:

common elder and European elder: a common shrub with black fruit or a small tree of Europe and Asia; fruit used for wines and jellies

Other synonyms of common elder include black elder, bourtree, elderberry, Sambucus nigra.

common elder (noun)	European elder (noun)
a common shrub with black fruit or a small tree of Europe and Asia; fruit used for wines and jellies	a common shrub with black fruit or a small tree of Europe and Asia; fruit used for wines and jellies