it's a lake or an oasis when in a desert
An island is a body of land completely surrounded by water.
An Island
Land surrounded by water is an island . You are describing a peninsula.
A peninsula is a body of land surrounded by water except for one connection to land. An isthmus is a narrow strip of land surrounded by water on both sides, but connected to land on both ends.
An island. Or if your really picky, a floating rock.
A country that is completely surrounded by other countries is described as landlocked.
is when a land is surrounded by a body of water
A peninsula is a body of land surrounded by water on all sides but one, and the word has 9 letters, but no hyphen.
An area of land surrounded by water is called an island.
moat.
waterfall
A sea or bay. (or a saltwater lake, which is very rare)