elderberry vs bourtree

elderberry and bourtree both are nouns.

Word	Noun	Adjective	Verb	Adverb
elderberry	Yes	No	No	No
bourtree	Yes	No	No	No

As nouns, elderberry and bourtree are synonyms defined as:

elderberry and bourtree: 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, common elder, European elder, Sambucus nigra.

elderberry (noun)	bourtree (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