The term BUNYAN TOOL is a reference to the legendary lumberjack Paul Bunyan, who is said to have used an AXE as his primary tool. An AXE is a three-letter word, and is the solution to this crossword puzzle. An AXE is a tool used for chopping wood, and is composed of a handle and a head with a sharp blade. It is a versatile tool that can be used for many tasks, such as splitting logs, cutting branches, and clearing brush.