Carpentry groove is a term used to describe the various types of grooves and joints used in carpentry. The four crossword solutions for this term are DADO (4 letters), RABBET (6 letters), Dados (5 letters), TRADE (5 letters) and SPLINE (6 letters). A DADO is a groove cut across the grain of the wood, while a RABBET is a groove cut along the edge of the wood. Dados are often used to join two pieces of wood together, while a TRADE is a type of joint used to join two pieces of wood at an angle. Finally, a SPLINE is a thin strip of wood that is inserted into a groove to strengthen the joint.