goat willow vs Salix caprea

goat willow and Salix caprea both are nouns.

Word	Noun	Adjective	Verb	Adverb
goat willow	Yes	No	No	No
Salix caprea	Yes	No	No	No

As nouns, goat willow and Salix caprea are synonyms defined as:

goat willow and Salix caprea: much-branched Old World willow having large catkins and relatively large broad leaves

Other synonyms of goat willow include florist's willow, pussy willow.

goat willow (noun)	Salix caprea (noun)
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