A mere, a lake or an inland sea.
Peninsula
A narrow portion of land partly surrounded by water is a peninsula A narrow portion fo land completely surrounded by water is an island
A lake.
yes Venice is partly surrounded by water
a sea
islands are pieces of land completely surrounded by water.
An island is a land mass completely surrounded by water, be it as large as Australia or as small as just a few feet.
a bay
Australia and Antarctica are continents completely surrounded by water.
A gulf is a large area of ocean or sea that is partly enclosed by land, while a peninsula is a piece of land that is surrounded by water on three sides. Essentially, a peninsula is connected to the mainland by a narrow strip of land, while a gulf is a large water body partially enclosed by land.
A bay is a body of water that is partly enclosed by land (and is usually smaller than a gulf).
An island is a body of land completely surrounded by water.