Final answer:
The synonym for 'kingdom' with Latin roots for 'regal' is 'realm'. It relates to the governance style where a single person, a monarch, reigns, often hereditarily and sometimes justified by divine right.
Step-by-step explanation:
The synonym for "kingdom" that comes from the Latin for "regal" is realm. The word realm is related to the Latin word regalis, which means royal or kingly and is associated with the authority of a monarch. In most cases, the term "monarchy" refers to a form of government where a single person, known as a monarch, rules until their death or abdication. This term encapsulates the idea of a sovereign area ruled by a king or queen, which may often be hereditary in nature or perceived to have divine legitimacy through something like the divine right of kings.