The term 'HEAVY TOOL' can be described by three crossword solutions: HAMMER (6 letters), MAUL (4 letters), and SLEDGE (6 letters). A HAMMER is a tool with a heavy head and a handle, used for pounding nails into wood or other materials. A MAUL is a large, heavy HAMMER used for driving stakes or wedges. A SLEDGE is a large, heavy HAMMER with a long handle, used for breaking up rocks or driving stakes into the ground. All three of these tools are used for heavy-duty tasks, such as construction or demolition.