aspen poplar vs white poplar

aspen poplar and white poplar both are nouns.

Word	Noun	Adjective	Verb	Adverb
aspen poplar	Yes	No	No	No
white poplar	Yes	No	No	No

As nouns, aspen poplar and white poplar are synonyms defined as:

aspen poplar and white poplar: a poplar that is widely cultivated in the United States; has white bark and leaves with whitish undersurfaces

Other synonyms of aspen poplar include abele, Populus alba, silver-leaved poplar, white aspen.

aspen poplar (noun)	white poplar (noun)
a poplar that is widely cultivated in the United States; has white bark and leaves with whitish undersurfaces	a poplar that is widely cultivated in the United States; has white bark and leaves with whitish undersurfaces
	light easily worked wood of a tulip tree; used for furniture and veneer