hoary willow vs Salix candida

hoary willow and Salix candida both are nouns.

Word	Noun	Adjective	Verb	Adverb
hoary willow	Yes	No	No	No
Salix candida	Yes	No	No	No

As nouns, hoary willow and Salix candida are synonyms defined as:

hoary willow and Salix candida: North American shrub with whitish canescent leaves

Other synonyms of hoary willow include sage willow.

hoary willow (noun)	Salix candida (noun)
North American shrub with whitish canescent leaves	North American shrub with whitish canescent leaves