Mortises' counterparts are tenons, which are a type of joint used in woodworking. Tenons are created by cutting a rectangular or square hole into a piece of wood, and then cutting a matching rectangular or square shape on the end of a second piece of wood. The two pieces are then joined together with glue, nails, or screws. Tenons are often used to join two pieces of wood together at right angles, such as when constructing furniture.