WordNet sense 1 (shrubby tree closely related to the Allegheny chinkapin but with larger leaves; southern midwestern United States):

Ozark chinkapin, Castanea ozarkensis, Ozark chinquapin

WordNet sense 2 (shrubby chestnut tree of southeastern United States having small edible nuts):

Allegheny chinkapin, Castanea pumila, dwarf chestnut, eastern chinquapin

WordNet sense 3 (small nut of either of two small chestnut trees of the southern United States; resembles a hazelnut):

chincapin, chinkapin