The phrase "royal family" refers to the members of a ruling monarch's household. Synonyms for this term include "monarchy", which denotes a system of government where a single ruler, typically a king or queen, has supreme power. Other synonyms include "diadem", which refers to a crown symbolizing royalty and often used to represent the monarch themselves. The term "sovereign" refers to the monarch and all their ancestors, while "dynasty" describes a line of rulers from the same family. Other related terms include "regal", "nobility", and "aristocracy", which are often used to refer to individuals or families with high social status and wealth.