FCO is an acronym that stands for Foreign and Commonwealth Office, the UK government department with responsibility for promoting their interests overseas. Some synonyms for FCO include Foreign Office, Foreign Ministry, Department of Foreign Affairs, and Ministry of Foreign Relations. While the names may differ slightly, these synonyms all refer to the same government agency responsible for managing diplomatic relationships between the UK and other countries and addressing issues that affect British citizens living, working, or traveling abroad. They work closely with UK embassies and consulates around the world, providing diplomatic support and advice to British nationals facing difficulties abroad.