"The Iron Duke" is a well-known nickname for Arthur Wellesley, the Duke of Wellington. However, there are several synonyms that could be used to refer to this iconic figure in British history. One alternative could be "the Duke of Victory," in reference to his numerous military triumphs. Another option could be "the Iron General," highlighting his reputation for being a tough and uncompromising leader. Additionally, "the Iron Man" or "the Iron Warrior" could be fitting references to his steely determination and unwavering resolve on the battlefield. Whatever the nickname, Wellington's legacy as a great military strategist and hero of the British Empire is undeniable.