A mere, a lake or an inland sea.
Gulf
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
A large area of land which is completely surrounded by water is a continent. A small area of land which is completely surrounded by water is an island.
A bay is a body of water that is partly enclosed by land (and is usually smaller than a gulf).
Island is surrounded by water.
An island is surrounded by water.