American chestnut vs Castanea dentata

American chestnut and Castanea dentata both are nouns.

Word	Noun	Adjective	Verb	Adverb
American chestnut	Yes	No	No	No
Castanea dentata	Yes	No	No	No

As nouns, American chestnut and Castanea dentata are synonyms defined as:

American chestnut and Castanea dentata: large tree found from Maine to Alabama

Other synonyms of American chestnut include American sweet chestnut.

American chestnut (noun)	Castanea dentata (noun)
large tree found from Maine to Alabama	large tree found from Maine to Alabama