Burrstone is a grinding wheel used for milling grains. It has a rough surface that is perfect for grinding and milling. However, there are various synonyms that can be used to refer to Burrstone. These synonyms include millstone, quernstone, grindstone, abrasive wheel, abrasive disc, sandstone, and sharpening stone. Millstones and quernstones are often used interchangeably with Burrstones as they are also used for grinding grains. Grindstones are also used for sharpening knives and tools. Abrasive wheels and abrasive discs are used in industrial settings to grind or cut materials. Sandstone is also used for sharpening knives and tools, while sharpening stones are smaller and typically used for sharpening small blades.