Steel is a strong and durable metal alloy that has been used for centuries in construction, manufacturing, and other industries. The crossword solutions for the term steel include HARDEN (6 letters), STRENGTHEN (10 letters), FORTIFY (7 letters), HEARTEN (7 letters), NERVE (5 letters), BRACE (5 letters), GIRD (4 letters), LAP (3 letters), toed (4 letters), WOOL (4 letters), ENURE (5 letters), and STAINLESS (9 letters). These words all describe ways to make steel stronger and more resilient, such as hardening it, strengthening it, fortifying it, heartening it, and bracing it. Girding, lapping, toed, WOOL, enuring, and STAINLESS are all processes used to improve the quality of steel.