Alnus veridis vs green alder

Alnus veridis and green alder both are nouns.

Word	Noun	Adjective	Verb	Adverb
Alnus veridis	Yes	No	No	No
green alder	Yes	No	No	No

As nouns, Alnus veridis and green alder are synonyms defined as:

Alnus veridis (noun)	green alder (noun)
shrub of mountainous areas of Europe	shrub of mountainous areas of Europe
	North American shrub with light green leaves and winged nuts