velvet osier vs Salix viminalis

velvet osier and Salix viminalis both are nouns.

Word	Noun	Adjective	Verb	Adverb
velvet osier	Yes	No	No	No
Salix viminalis	Yes	No	No	No

As nouns, velvet osier and Salix viminalis are synonyms defined as:

velvet osier and Salix viminalis: willow with long flexible twigs used in basketry

Other synonyms of velvet osier include common osier, hemp willow.

velvet osier (noun)	Salix viminalis (noun)
willow with long flexible twigs used in basketry	willow with long flexible twigs used in basketry