silver birch vs Betula pendula

silver birch and Betula pendula both are nouns.

Word	Noun	Adjective	Verb	Adverb
silver birch	Yes	No	No	No
Betula pendula	Yes	No	No	No

As nouns, silver birch and Betula pendula are synonyms defined as:

silver birch and Betula pendula: European birch with silvery white peeling bark and markedly drooping branches

Other synonyms of silver birch include common birch, European white birch.

silver birch (noun)	Betula pendula (noun)
European birch with silvery white peeling bark and markedly drooping branches	European birch with silvery white peeling bark and markedly drooping branches