eastern chinquapin vs Castanea pumila

eastern chinquapin and Castanea pumila both are nouns.

Word	Noun	Adjective	Verb	Adverb
eastern chinquapin	Yes	No	No	No
Castanea pumila	Yes	No	No	No

As nouns, eastern chinquapin and Castanea pumila are synonyms defined as:

eastern chinquapin and Castanea pumila: shrubby chestnut tree of southeastern United States having small edible nuts

Other synonyms of eastern chinquapin include Allegheny chinkapin, chinquapin, dwarf chestnut.

eastern chinquapin (noun)	Castanea pumila (noun)
shrubby chestnut tree of southeastern United States having small edible nuts	shrubby chestnut tree of southeastern United States having small edible nuts