General terms:
* Ridge: A long, narrow elevation of land.
* Hill: A rounded elevation of land, smaller than a mountain.
* Mound: A rounded, usually artificial elevation of earth.
* Crest: The highest point of a ridge or hill.
* Elevation: Any raised area of land.
More specific terms:
* Escarpment: A steep slope or cliff, often formed by faulting or erosion.
* Moraine: A ridge of debris deposited by a glacier.
* Levee: An embankment built to prevent flooding.
* Terrace: A step-like, flat surface of land.
* Dune: A hill of sand formed by wind.
The specific term used will depend on the context. For example, a small, artificial mound of earth might be called a "mound", while a long, narrow elevation of land formed by erosion might be called a "ridge".
Do you have any more information about the raised strip of land you're interested in? This might help me provide a more specific answer.