Reamers are tools that are used to enlarge the size of drilled holes in a variety of materials. There are several synonyms for reamers, including drill bits, cutters, files, burs, and grinders. Drill bits are the most similar to reamers as they are both used to drill holes, but reamers are more precise and are used to make existing holes larger. Cutters, files, and burs are also used to remove material from a workpiece but may have a more specific purpose. Grinders are typically used to shape and smooth materials, and while they can be used to enlarge holes, they are less precise than reamers.