black cottonwood vs Populus heterophylla

black cottonwood and Populus heterophylla both are nouns.

Word	Noun	Adjective	Verb	Adverb
black cottonwood	Yes	No	No	No
Populus heterophylla	Yes	No	No	No

As nouns, black cottonwood and Populus heterophylla are synonyms defined as:

black cottonwood and Populus heterophylla: North American poplar with large rounded scalloped leaves and brownish bark and wood

Other synonyms of black cottonwood include downy poplar, swamp cottonwood, swamp poplar.

black cottonwood (noun)	Populus heterophylla (noun)
cottonwood of western North America with dark green leaves shining above and rusty or silvery beneath	North American poplar with large rounded scalloped leaves and brownish bark and wood
North American poplar with large rounded scalloped leaves and brownish bark and wood