Smaller than a mountain, but still quite large:
* Hill: This is the most common term for a raised area of land smaller than a mountain.
* Plateau: A large, flat-topped area of land that stands above the surrounding countryside.
* Butte: A steep, isolated hill with a flat top, usually formed by erosion.
* Mesa: Similar to a butte, but larger and with a broader, flatter top.
Smaller and more rounded:
* Knoll: A small, rounded hill.
* Mound: A small, rounded pile of earth or rocks.
* Tumulus: An artificial mound of earth or stones, often built as a burial place.
The specific term used will depend on the size, shape, and formation of the raised land.