Salix repens vs creeping willow

Salix repens and creeping willow both are nouns.

Word	Noun	Adjective	Verb	Adverb
Salix repens	Yes	No	No	No
creeping willow	Yes	No	No	No

As nouns, Salix repens and creeping willow are synonyms defined as:

Salix repens and creeping willow: small trailing bush of Europe and Asia having straggling branches with silky green leaves of which several varieties are cultivated

Salix repens (noun)	creeping willow (noun)
small trailing bush of Europe and Asia having straggling branches with silky green leaves of which several varieties are cultivated	small trailing bush of Europe and Asia having straggling branches with silky green leaves of which several varieties are cultivated