"Sheet ice" is a common term used to describe a thin layer of ice that forms on a surface such as a road or body of water. However, there are many other synonyms that can be used to describe this phenomenon. Some of the most commonly used alternatives include black ice, clear ice, glazed ice, and freeze-up. Other synonyms include hard-packed snow, glassy ice, smooth ice, and solid ice. Some of these terms are specific to certain contexts, such as "black ice" which is used to describe thin sheets of ice that are nearly invisible on roads. Regardless of the context, each of these synonyms can be used interchangeably to describe sheet ice and its dangerous, slippery quality.