common alder vs Alnus glutinosa

common alder and Alnus glutinosa both are nouns.

Word	Noun	Adjective	Verb	Adverb
common alder	Yes	No	No	No
Alnus glutinosa	Yes	No	No	No

As nouns, common alder and Alnus glutinosa are synonyms defined as:

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

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

common alder (noun)	Alnus glutinosa (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