pocosin

or po·co·son, po·co·sen

[ puh-koh-suh n, poh-kuh-suh n ]
/ pəˈkoʊ sən, ˈpoʊ kə sən /

noun Southeastern U.S.

a swamp or marsh in an upland coastal region.

Origin of pocosin

An Americanism dating back to 1625–35; probably < an unattested form in a southern Eastern Algonquian language