American sweet chestnut vs American chestnut

American sweet chestnut and American chestnut both are nouns.

Word	Noun	Adjective	Verb	Adverb
American sweet chestnut	Yes	No	No	No
American chestnut	Yes	No	No	No

As nouns, American sweet chestnut and American chestnut are synonyms defined as:

American sweet chestnut and American chestnut: large tree found from Maine to Alabama

Other synonyms of American sweet chestnut include Castanea dentata.

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