bourtree vs European elder

bourtree and European elder both are nouns.

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

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

bourtree 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 bourtree include black elder, common elder, elderberry, Sambucus nigra.

bourtree (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