silver willow vs Salix sericea

silver willow and Salix sericea both are nouns.

Word	Noun	Adjective	Verb	Adverb
silver willow	Yes	No	No	No
Salix sericea	Yes	No	No	No

As nouns, silver willow and Salix sericea are synonyms defined as:

silver willow and Salix sericea: North American willow with greyish silky pubescent leaves that usually blacken in drying

Other synonyms of silver willow include Salix alba sericea, silky willow.

silver willow (noun)	Salix sericea (noun)
North American willow with greyish silky pubescent leaves that usually blacken in drying	North American willow with greyish silky pubescent leaves that usually blacken in drying