Earth's water doesn't have a specific name. It's just called water.

However, there are some terms that are used to refer to specific parts of Earth's water:

* Hydrosphere: This is the collective term for all the water on Earth, including oceans, lakes, rivers, groundwater, and ice.

* World Ocean: This refers to the interconnected body of salt water that covers most of the Earth's surface.

* Freshwater: This refers to water that is not salty, such as found in lakes, rivers, and groundwater.

Let me know if you have any other questions!