common osier vs Salix viminalis

common osier and Salix viminalis both are nouns.

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

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

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

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

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