Sambucus caerulea vs blue elder

Sambucus caerulea and blue elder both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sambucus caerulea	Yes	No	No	No
blue elder	Yes	No	No	No

As nouns, Sambucus caerulea and blue elder are synonyms defined as:

Sambucus caerulea and blue elder: shrub or small tree of western United States having white flowers and blue berries; fruit used in wines and jellies

Other synonyms of Sambucus caerulea include blue elderberry.

Sambucus caerulea (noun)	blue elder (noun)
shrub or small tree of western United States having white flowers and blue berries; fruit used in wines and jellies	shrub or small tree of western United States having white flowers and blue berries; fruit used in wines and jellies