The elevation of an object in relationship to a given plane, often sea level.
Altitude
a body of water interspersed with many isles
Archipelago
a long, narrow passage of water; a creek
Arm
a ring-shaped coral reef, island, or set of small islands nearly or completely surrounding a lagoon.
Atoll
a steep slope of ground rising from a lake, a river, or the sea.
Bank
a hollow place for water; an enclosed part of water, forming a broad space within a strait or narrow entrance; a little bay
Basin
an arm of the sea, extending into the land, smaller than a gulf and larger than a creek.
Bay
a soggy, swampy, slow-moving body of water, obstructed by vegetation.
Bayou
a shore of the sea or of a lake, washed by the tide and waves.
Beach
a high bank, almost perpendicular, projecting into the sea.
Bluff
soft, wet ground covered with grass or other plants, too soft to bear a man.
Bog
a smaller stream running into a larger one or proceeding from it.
Branch
a rock that breaks the waves; a wave that breaks against a rock, a sand bank, or the shore, exhibiting a white foam.
Breakers
the edge, margin, or border of a steep place, as of a precipice or the bank of a river.
Brink
a small natural stream of water; a current flowing from a spring.
Brook
Canal
a long deep hollow with steep, rocky sides worn by a stream or torrent of water.
Canyon
a head land; the head, point, or termination of a neck of land, extending some distance into the sea beyond the common shore.
Cape
a hollow place in the earth; a subterraneous caver; a den; may be natural or artificial.
Cavern
an arm of the sea; a straight or narrow sea between two continents or between a continent and an isle.
Channel
a cleft or fissure in a rock or the earth's surface caused by a disrupture.
Chasm
a cone-shaped hill of volcanic material surrounding an opening in the earth.
Cinder Cone
a high, steep almost vertical rock, usually on a coast.
Cliff
the edge or margin of the land next to the sea; the seashore.
Coast
a great extent of land, not disjoined or interrupted by a sea.
Continent