Castanea pumila vs chinquapin

Castanea pumila and chinquapin both are nouns.

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

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

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

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

Castanea pumila (noun)	chinquapin (noun)
shrubby chestnut tree of southeastern United States having small edible nuts	small nut of either of two small chestnut trees of the southern United States; resembles a hazelnut
	shrubby chestnut tree of southeastern United States having small edible nuts
	shrubby tree closely related to the Allegheny chinkapin but with larger leaves; southern midwestern United States