The term 'put an edge on' can be solved by four different words: HONE (4 letters), HONED (5 letters), WHET (4 letters), and STROP (5 letters). HONE is a verb meaning to sharpen or refine something, usually a blade. HONED is the past tense of HONE, and is used to describe something that has been sharpened or refined. WHET is another verb meaning to sharpen or make more intense. Finally, STROP is a noun referring to a leather strap used to sharpen a blade. All of these words refer to the process of sharpening or refining a blade, which is what the phrase 'put an edge on' means.