The term CARPENTRY WEDGE can be broken down into two crossword solutions: SHIM (4 letters) and WEDGE (6 letters). A SHIM is a thin piece of material, such as wood or metal, used to fill in gaps between objects. It is often used in carpentry to level out uneven surfaces. A WEDGE is a triangular shaped object that is used to split or separate two objects. In carpentry, wedges are used to hold objects together or to keep them from moving.