elderberry vs common elder

elderberry and common elder both are nouns.

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

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

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

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

elderberry (noun)	common elder (noun)
berrylike fruit of an elder used for e.g. wines and jellies	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