General terms:
* Butte: A hill with a flat top and steep sides, usually smaller than a mesa.
* Mesa: A large, flat-topped hill with steep sides, often formed by erosion.
* Hilltop: This is a general term for the top of any hill, but it can be used to describe a flat-topped hill as well.
* Plateau: A large, flat area elevated above the surrounding land. This term is more appropriate for larger, more extensive flat tops.
Other possible terms:
* Mound: A raised area of land, often smaller and less steep than a butte.
* Tableland: A plateau with steep sides.
* Rock formation: This is a more general term that could apply if the flat top is formed by a unique geological feature.
The best term to use will depend on the specific characteristics of the hill, its size, and the context in which it is being described.
