If it's natural it's more likely to be a lake, an artificial body of water is more likely to be called a pond or a reservoir. If it's big it's more likely to be called a lake.
Largest lakes by surface areaEdit
The three largest lakes are,
- The Caspian Sea in Asia - 371,000 sq km (143,000 sq mi)
- Lake Superior in North America - 82,100 sq km (31,698 sq mi)
- Lake Victoria in Africa