European black alder vs Alnus vulgaris

European black alder and Alnus vulgaris both are nouns.

Word	Noun	Adjective	Verb	Adverb
European black alder	Yes	No	No	No
Alnus vulgaris	Yes	No	No	No

As nouns, European black alder and Alnus vulgaris are synonyms defined as:

European black alder and Alnus vulgaris: medium-sized tree with brown-black bark and woody fruiting catkins; leaves are hairy beneath

Other synonyms of European black alder include Alnus glutinosa, common alder.

European black alder (noun)	Alnus vulgaris (noun)
medium-sized tree with brown-black bark and woody fruiting catkins; leaves are hairy beneath	medium-sized tree with brown-black bark and woody fruiting catkins; leaves are hairy beneath