the pyramid of giza.
ziggurat
The Cahokia civilization in North America is known for their flat-topped mounds.
A flat topped flower cluster is called a corymb or a cyme.
A flat topped mud brick tomb is called a mastaba.
Cyme
Unusual flat-topped seamounts in the ocean are called Guyots. Guyots are submerged volcanic mountains with a flat top that has been eroded by waves and currents over time.
On the top of the pyramid is called the CAPSTONE.
A flat-topped mountain is called a plateau. Plateaus are elevated landforms with a relatively flat top surface that are often formed by the erosion of surrounding land.
The flat-top pyramid is called a ziggurat.
The name of the flat top pyramid is called the ziggurat. They were not made by Egyptians however, they were made by the Mesopotamians.
We apply the term mesa to a flat-topped mountain.
plateau