a ring-shaped coral reef or a string of closely spaced small coral islands, enclosing or nearly enclosing a shallow lagoon
Sound
a relatively narrow passage of water between larger bodies of water or between the mainland and an island
Canal
an artificial waterway for navigation, irrigation, etc
Strait
a relatively narrow passage of water between larger bodies of water or between the mainland and an island
Archipelago
a large group or chain of islands
Butte
an isolated hill or mountain rising abruptly above the surrounding land
Fjord
a long, narrow arm of the sea bordered by steep cliffs: usually formed by glacial erosion
Mesa
a land formation, less extensive than a plateau, having steep walls and a relatively flat top and common in arid and semiarid parts of the southwestern U.S. and Mexico
Channel
a wide strait, as between a continent and an island
Atoll
a ring-shaped coral reef or a string of closely spaced small coral islands, enclosing or nearly enclosing a shallow lagoon
