American red elder vs Sambucus pubens

American red elder and Sambucus pubens both are nouns.

Word	Noun	Adjective	Verb	Adverb
American red elder	Yes	No	No	No
Sambucus pubens	Yes	No	No	No

As nouns, American red elder and Sambucus pubens are synonyms defined as:

American red elder and Sambucus pubens: common North American shrub or small tree

Other synonyms of American red elder include red-berried elder, stinking elder.

American red elder (noun)	Sambucus pubens (noun)
common North American shrub or small tree	common North American shrub or small tree