The term 'hand tool for boring holes' can be summarized by two words: GIMLET (6 letters) and AUGER (5 letters). A GIMLET is a small, hand-operated tool used to bore small holes in wood. It consists of a handle with a metal shaft that has a sharpened tip at one end and a screw thread at the other. An AUGER is a similar tool, but it has a longer shaft and a helical blade at the end which is used to bore larger holes in wood. Both tools are commonly used in carpentry and other woodworking tasks.