balsam willow vs Salix pyrifolia

balsam willow and Salix pyrifolia both are nouns.

Word	Noun	Adjective	Verb	Adverb
balsam willow	Yes	No	No	No
Salix pyrifolia	Yes	No	No	No

As nouns, balsam willow and Salix pyrifolia are synonyms defined as:

balsam willow and Salix pyrifolia: small shrubby tree of eastern North America having leaves exuding an odor of balsam when crushed

balsam willow (noun)	Salix pyrifolia (noun)
small shrubby tree of eastern North America having leaves exuding an odor of balsam when crushed	small shrubby tree of eastern North America having leaves exuding an odor of balsam when crushed