A large area of treeless grassland can be a plain, savanna or prairie.
The grasslands in the Us are called "the Great Plains."
plateau
They both mean the same thing, a flat, basically treeless area.
Geographically, a "plain" is a large, treeless area of level or nearly level land. By convention the term "plain" is usually used to describe a low level flat area such as a coastal plain, sea floor plain, a river plain or a lunar plain (mare) rather than an elevated flat area which would be called a plateau.
The name given to an area that is a flat treeless plain is a steppe.
Plain
Tundra is a flat, treeless plain where the subsoil is frozen
A large area of treeless grassland can be a plain, savanna or prairie.
an area of land of mostly flat treeless land
Llano
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The grasslands in the Us are called "the Great Plains."
plateau
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A cold treeless lowland area, permanently frozen, known as Tundra. It supports small shrubs, mosses and grasses
Treeless Plain was created on -19-09-08.