chinquapin oak vs chestnut oak

chinquapin oak and chestnut oak both are nouns.

Word	Noun	Adjective	Verb	Adverb
chinquapin oak	Yes	No	No	No
chestnut oak	Yes	No	No	No

As nouns, chestnut oak is a hypernym of chinquapin oak; that is, chestnut oak is a word with a broader meaning than chinquapin oak:

chinquapin oak: medium-sized deciduous tree of the eastern United States that yields a strong durable wood
chestnut oak: an oak having leaves resembling those of chestnut trees

chinquapin oak (noun)	chestnut oak (noun)
medium-sized deciduous tree of the eastern United States that yields a strong durable wood	an oak having leaves resembling those of chestnut trees