archipelago: a chain of islands arroyo: a deep, dry, water-carved gully atoll: a coral reef that encircles a lagoon bay: an inlet of a sea or lake, larger than a cove, smaller than a gulf butte: a flat-topped, steep hill, smaller than a mesa caldera: a bowl-shaped hollow in the peak of a volcano canyon: a narrow, deep valley with steep sides cape: a pointed piece of land that sticks out to form a bay cove: a small inlet of a sea or lake delta: a fan-shaped alluvial deposit at the mouth of a river desert: an area of scant precipitation and little vegetation estuary: the salty end of a river where it meets the sea fjord: a glacier-produced coastal valley filled with seawater gulf: a large inlet of a sea hurricane: a high-wind tropical storm in the Atlantic (called typhoon in the Pacific) isthmus: a narrow strip of land with water on both sides lagoon: a shallow body of water between a reef and shore or within an atoll loess: a fine deposit of silt, sand, and clay marsh: a fresh or salt wetland found near ponds, lakes, rivers, or seacoasts mesa: a flat-topped, steep hill moraine: an accumulation of glacial deposits oasis: a fertile area in a desert peninsula: a mass of land surrounded by water on three sides plain: flat, usually grassy land plateau: a large, elevated, flat area of land prairie: a wide, flat grassland range: a chain of mountains sound: a long inlet usually separating the shoreline from an island strait: a narrow body of water that connects two larger bodies of water swamp: a freshwater wetland tundra: a cold, treeless region watershed: an area drained by a river and its tributaries
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