A sharpener is a tool used to sharpen blades, such as knives, scissors, and other cutting tools. The crossword solutions for the term sharpener are HONER (5 letters), STROP (5 letters), OILSTONE (8 letters), and WHETSTONE (9 letters). A honer is a tool used to hone a blade, which is the process of refining the edge of a blade. A STROP is a leather strap used to sharpen a blade by stropping it against the leather. An OILSTONE is a stone used to sharpen blades with oil. Finally, a WHETSTONE is a stone used to sharpen blades with water.