A mountain climber's tool is essential for scaling mountains and other steep terrain. PITON, which is five letters long, is a metal spike that is driven into the rock face to provide an anchor point for a rope. Iceax, also five letters long, is a tool used for cutting steps in ice or snow. An iceaxe, which is six letters long, is a combination of an axe and a pick, used for climbing steep ice and snow.