swamp poplar vs Populus heterophylla

swamp poplar and Populus heterophylla both are nouns.

Word	Noun	Adjective	Verb	Adverb
swamp poplar	Yes	No	No	No
Populus heterophylla	Yes	No	No	No

As nouns, swamp poplar and Populus heterophylla are synonyms defined as:

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

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

swamp poplar (noun)	Populus heterophylla (noun)
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