The term "royal household" refers to the members of a reigning monarch's immediate family and their household staff. However, there are many synonyms that can be used to describe this group, including "royal court," "imperial family," "crown estate," "palace household," and "monarchy unit." Additionally, depending on the culture and country, there are specific terms used to describe the royal household, such as "kamisato" in Japan or "court of St. James" in the United Kingdom. Each of these synonyms provides a unique perspective on the royal household and its role in society, showcasing the diverse and intricate nature of monarchy.