Dean Gooderham Acheson was a prominent American statesman and lawyer who served as the US Secretary of State under President Harry S. Truman from 1949 to 1953. He played a crucial role in the formulation of US foreign policy during the Cold War era, particularly in the development of the Truman Doctrine and the Marshall Plan. Some synonyms for Acheson include diplomat, politician, government official, statesman, public figure, and foreign policy expert. His contributions to American politics and foreign policy have been widely recognized, and he remains an important figure in US history.