whitewood vs white poplar

whitewood and white poplar both are nouns.

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

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

whitewood and white poplar: light easily worked wood of a tulip tree; used for furniture and veneer

Other synonyms of whitewood include true tulipwood, tulipwood, yellow poplar.

whitewood (noun)	white poplar (noun)
light easily worked wood of a tulip tree; used for furniture and veneer	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