Populus canescens vs gray poplar

Populus canescens and gray poplar both are nouns.

Word	Noun	Adjective	Verb	Adverb
Populus canescens	Yes	No	No	No
gray poplar	Yes	No	No	No

As nouns, Populus canescens and gray poplar are synonyms defined as:

Populus canescens and gray poplar: large rapidly growing poplar with faintly lobed dentate leaves grey on the lower surface; native to Europe but introduced and naturalized elsewhere

Other synonyms of Populus canescens include grey poplar.

Populus canescens (noun)	gray poplar (noun)
large rapidly growing poplar with faintly lobed dentate leaves grey on the lower surface; native to Europe but introduced and naturalized elsewhere	large rapidly growing poplar with faintly lobed dentate leaves grey on the lower surface; native to Europe but introduced and naturalized elsewhere