weeping willow vs Babylonian weeping willow

weeping willow and Babylonian weeping willow both are nouns.

Word	Noun	Adjective	Verb	Adverb
weeping willow	Yes	No	No	No
Babylonian weeping willow	Yes	No	No	No

As nouns, weeping willow and Babylonian weeping willow are synonyms defined as:

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

Other synonyms of weeping willow include Salix babylonica.

weeping willow (noun)	Babylonian 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