There are several synonyms for the term "bank of earth". One term that is often used interchangeably with bank of earth is "earth bank". Another synonym that can be used is a "bund", which refers to a man-made embankment or dike. "Levee" is another term that can be used to refer to a bank of earth, specifically in relation to a river or other body of water. "Mound" or "hillock" can also be synonyms for the term, depending on the context. Overall, these synonyms all refer to an earthen structure that is constructed for a variety of purposes, including erosion control, flood protection, and landscaping.