The term 'Royal Realms' is composed of two crossword solutions: EMPIRES (7 letters) and DOMAINS (7 letters). An empire is a large political unit that is typically composed of multiple countries or regions, and is usually ruled by a single monarch. EMPIRES have existed throughout history, with some of the most famous being the Roman Empire, the British Empire, and the Mongol Empire. A domain is a territory or area of control, usually referring to a region or country that is under the rule of a particular ruler or government. DOMAINS are often associated with EMPIRES, as they are the territories that are controlled by the ruling monarch. Royal Realms, then, can refer to both EMPIRES and DOMAINS, which are both under the rule of a single monarch.