Salix babylonica vs weeping willow

Salix babylonica and weeping willow both are nouns.

Word	Noun	Adjective	Verb	Adverb
Salix babylonica	Yes	No	No	No
weeping willow	Yes	No	No	No

As nouns, Salix babylonica and weeping willow are synonyms defined as:

Salix babylonica and weeping willow: willow with long drooping branches and slender leaves native to China; widely cultivated as an ornamental

Other synonyms of Salix babylonica include Babylonian weeping willow.

Salix babylonica (noun)	weeping willow (noun)
willow with long drooping branches and slender leaves native to China; widely cultivated as an ornamental	willow with long drooping branches and slender leaves native to China; widely cultivated as an ornamental