silky willow vs silver willow

silky willow and silver willow both are nouns.

Word	Noun	Adjective	Verb	Adverb
silky willow	Yes	No	No	No
silver willow	Yes	No	No	No

As nouns, silky willow and silver willow are synonyms defined as:

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

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

silky willow (noun)	silver willow (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
small shrubby tree of western North America (Alaska to Oregon)