Land so surrounded by water as to be almost an island

The correct answer is peninsula. A peninsula is a piece of land that is surrounded by water on three sides. It is almost an island, but it is connected to the mainland by a narrow strip of land.

An archipelago is a group of islands. An isthmus is a narrow strip of land that connects two larger landmasses. A lagoon is a shallow body of water that is separated from the ocean by a barrier reef or sandbar.

Here are some examples of peninsulas:

• The Iberian Peninsula, which is home to Spain and Portugal
• The Italian Peninsula, which is home to Italy
• The Anatolian Peninsula, which is home to Turkey
• The Korean Peninsula, which is home to North Korea and South Korea
• The Jutland Peninsula, which is home to Denmark and Germany

Here are some examples of archipelagos:

• The Hawaiian Islands
• The Philippines
• The Caribbean Islands
• The British Isles
• The Indonesian Islands

Here are some examples of isthmuses:

• The Isthmus of Panama
• The Isthmus of Corinth
• The Isthmus of Suez
• The Isthmus of Kra
• The Isthmus of Tehuantepec

Here are some examples of lagoons:

• The Great Barrier Reef Lagoon
• The Red Sea Lagoon
• The Lagoon of Venice
• The Barracuda Point Lagoon
• The Molokini Crater Lagoon