The term 'Tilter's Tool' is a crossword solution for the word 'LANCE', which is a five-letter word. A LANCE is a long, pointed weapon that was used by knights in medieval times. It is also used in jousting tournaments, where two opponents on horseback charge at each other with lances. Today, lances are still used in some equestrian sports, such as show jumping and dressage. In addition, lances are used in some industrial applications, such as welding and cutting.