The phrase "toothing nail" refers to a specific type of nail used in woodworking. The nail features small serrations on the shank, allowing it to grip the wood fibers and provide a stronger hold than a smooth nail. While "toothing nail" is the most common term for this type of nail, there are a few synonyms that can be used interchangeably, including "serrated nail" and "grip nail". These synonyms all describe the same type of nail and can be used in woodworking projects where a stronger hold is required. No matter what terminology you use, the toothing nail is an essential tool in the woodworker's toolbox.