red-berried elder vs stinking elder

red-berried elder and stinking elder both are nouns.

Word	Noun	Adjective	Verb	Adverb
red-berried elder	Yes	No	No	No
stinking elder	Yes	No	No	No

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

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

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

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