white willow vs Huntingdon willow

white willow and Huntingdon willow both are nouns.

Word	Noun	Adjective	Verb	Adverb
white willow	Yes	No	No	No
Huntingdon willow	Yes	No	No	No

As nouns, white willow and Huntingdon willow are synonyms defined as:

white willow and Huntingdon willow: large willow tree of Eurasia and North Africa having greyish canescent leaves and grey bark

Other synonyms of white willow include Salix alba.

white willow (noun)	Huntingdon willow (noun)
large willow tree of Eurasia and North Africa having greyish canescent leaves and grey bark	large willow tree of Eurasia and North Africa having greyish canescent leaves and grey bark