Populus canescens vs grey poplar

Populus canescens and grey poplar both are nouns.

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

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

Populus canescens and grey 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 gray poplar.

Populus canescens (noun)	grey 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