could be plateau or steppe
A Plateau
plateu
They are called the geomorphological features.
plateu
A Cliff.
Land above sea level could be anything from flat lands to a plateau. It depends on the location of the sea and land.
Some flat lands are prairies, some are plateaus, and some are wetlands.
plateu
A Plateau
The Coastal Plains
It is called tableland, an area of highland, usually consisting of relatively flat terrain. Another term is plateau. A smaller flat-topped landform is a mesa.
They are called the geomorphological features.
A large, flat area of land is called a plain.
Northern plains
it is called level
Flat
Flat lands are also called plains in general.