Sir George Otto Trevelyan is not a word with synonyms. It is a proper noun that refers to a person's name. However, to provide some context, Sir George Otto Trevelyan was a British statesman and historian who lived in the 19th century. He was particularly known for his extensive writings on the American Revolution and his involvement in British politics. Some of his notable works include "The American Revolution" and "The Life and Letters of Lord Macaulay". Overall, Sir George Otto Trevelyan's contributions to both the academic and political spheres have made him a significant figure in British history.