Hills are landforms that rise above the surrounding terrain, but they are generally lower and less steep than mountains. They are often rounded in shape, but can also have other forms.

Here are some other terms for rounded mounds that might fit your description:

* Knoll: A small, rounded hill.

* Mound: A raised area of land, often formed by natural processes like glacial deposits or volcanic activity.

* Butte: A hill with steep sides and a flat top.

* Mesa: A flat-topped hill with steep sides, often formed by erosion.

Let me know if you have any other questions!