The word "sandhill" is often used to describe a hill that has been formed by sand deposits. However, there are other synonyms that can be used to describe this natural landscape feature. Some of these include dune, ridge, hill, knoll, mound, and escarpment. While the word "sandhill" specifically refers to hills formed by sand, the synonyms are more general and can refer to hills formed by other materials as well. Using these synonyms can help to add variety and interest to descriptions of landscapes and can also help to convey specific characteristics of the landforms being described.