Timber tools are tools used in the process of timbering, which is the process of cutting down trees and preparing them for use in construction. The three timber tools mentioned in the crossword solutions are an ADZ (3 letters), an ADZE (4 letters), and a broadax (7 letters). An ADZ is a tool with a curved blade set at right angles to a handle, used for shaping wood. An ADZE is a tool similar to an ADZ, but with a blade set at an angle to the handle. A broadax is a large ax with a broad blade, used for hewing or shaping logs.