What is the word that matches to definition a small hill or mound?

There are several words that could fit the definition of a small hill or mound, depending on the specific context and nuance you want to convey. Here are a few options:

* Knoll: This is a common word for a small, rounded hill, often covered with grass.

* Mound: This is a general term for a pile of earth or other material, which can be natural or artificial.

* Hillock: Similar to knoll, but can be a bit larger and less rounded.

* Rise: A less specific term, referring to any elevation in the land.

* Bump: A small, usually insignificant, elevation.

The best word to use will depend on the specific situation.