a piece of land completely surrounded by water

the salty water that covers a large part of the surface of the earth, or a large area of salty water, smaller than an ocean, that is partly or completely surrounded by land

water, especially from a river or stream, dropping from a higher to a lower point, sometimes from a great height

an area of sand or small stones near the ocean or another area of water such as a lake

a high area of land that is smaller than a mountain

an area of coral, the top of which can sometimes be seen just above the sea

an area of low land between hills or mountains, often with a river running through it

a large area of land covered with trees and plants, usually larger than a wood, or the trees and plants themselves

a large hole in the ground or in the side of a mountain

a place in the desert where there is water and where plants grow

a deep valley between high steep banks, usually containing a river

a natural wide flow of fresh water across the land into the sea, a lake, or another river

a field of grass, often with flowers

an area, often covered with sand or rocks, where there is very little rain and not many plants