pussy willow vs florist's willow

pussy willow and florist's willow both are nouns.

Word	Noun	Adjective	Verb	Adverb
pussy willow	Yes	No	No	No
florist's willow	Yes	No	No	No

As nouns, pussy willow and florist's willow are synonyms defined as:

pussy willow and florist's willow: much-branched Old World willow having large catkins and relatively large broad leaves

Other synonyms of pussy willow include goat willow, Salix caprea.

pussy willow (noun)	florist's willow (noun)
small willow of eastern North America having greyish leaves and silky catkins that come before the leaves	much-branched Old World willow having large catkins and relatively large broad leaves
much-branched Old World willow having large catkins and relatively large broad leaves