A Scotch harrow is a tool used for breaking up soil and preparing it for planting. It is also known by various synonyms, each carrying a different regional or historical connotation. These include drag harrow, chain harrow, smoothing harrow, and spike-tooth harrow. A drag harrow is primarily used for leveling soil and spreading fertilizer, while a chain harrow is commonly used for preparing seedbeds and smoothing the ground. A smoothing harrow, as the name suggests, is used for creating a level surface, while a spike-tooth harrow is best suited for breaking up hard soil and removing weeds. Each of these synonyms denotes a specific function of the harrow, giving farmers and gardeners a range of options to choose from based on their specific needs.