Corkwood is a type of tree that is native to tropical and subtropical regions. The two crossword solutions for the term corkwood are BALSA (5 letters) and Balsas (6 letters). BALSA is a lightweight wood that is derived from the corkwood tree and is commonly used in model building, as well as for making musical instruments and furniture. Balsas is the plural form of BALSA, which refers to multiple pieces of BALSA wood.