General Monarchs:
* Sovereign: This is a general term for a supreme ruler.
* Monarch: This is the most general term for a king or queen.
* Regent: A person who rules in place of a king or queen, usually because they are too young, too ill, or absent.
* Head of State: This term emphasizes the role of the monarch as the symbolic leader of a country.
* Ruler: This is a broad term that can refer to any type of leader, including kings, queens, emperors, and presidents.
More Specific Synonyms for King:
* Emperor: A ruler of an empire.
* Shah: A king in Persia and other parts of the Middle East.
* Sultan: A Muslim ruler, often of a kingdom or empire.
* Chieftain: A leader of a tribe or clan.
* Prince: A son of a king or queen.
* Duke: A nobleman of high rank.
* Lord: A title of respect for a nobleman.
More Specific Synonyms for Queen:
* Empress: The wife of an emperor or a female sovereign in her own right.
* Shahbanu: The queen of Persia.
* Sultanah: The wife of a Sultan.
* Princess: A daughter of a king or queen.
* Duchess: The wife of a duke.
* Lady: A title of respect for a woman of noble rank.
Informal Synonyms:
* Boss: This is a casual term for a king or queen, especially in a humorous context.
* Big cheese: This is another informal term for a king or queen, often used in a humorous way.
* The Man/Woman in Charge: This is a more literal way of describing a king or queen's authority.
The best synonym for a king or queen will depend on the specific situation and context.