Corset stiffeners are materials used to add structure and support to corsets. The crossword solutions for the term corset stiffener include BALEEN (6 letters), BONE (4 letters), STAY (4 letters), stays (5 letters), ULNA (4 letters), STARCH (6 letters), and GEL (3 letters). BALEEN is a material made from whalebone, while BONE is a hard, rigid connective tissue found in animals. STAY and stays are both terms for a type of stiffening material used in corsets, usually made of metal or whalebone. ULNA is a long BONE in the forearm, and STARCH is a carbohydrate used to stiffen fabric. Finally, GEL is a thick, jelly-like substance that can be used to stiffen corsets.