The term "all-powerful ruler" refers to a person who holds absolute power and authority over a particular land or people. There are various synonyms for this term, including authoritarian, despot, dictator, autocrat, tyrant, potentate, monarch, and absolute ruler. These words suggest that the ruler has complete control over the lives, freedoms, and livelihoods of the people under their reign. However, each of these terms may have slight nuances in meaning, depending on the context in which they are used. Regardless of the word used to describe such a ruler, it often connotes a sense of fear and oppression among the people under their rule.