American red elder vs stinking elder

American red elder and stinking elder both are nouns.

Word	Noun	Adjective	Verb	Adverb
American red elder	Yes	No	No	No
stinking elder	Yes	No	No	No

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

American red elder and stinking elder: common North American shrub or small tree

Other synonyms of American red elder include red-berried elder, Sambucus pubens.

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