Fon is a word that is used to describe a person who is a chief or ruler in some African cultures. However, there are many other words that can be used as synonyms to describe a leader or ruler. Some of these words include king, queen, chieftain, monarch, headman, leader, tribal chief, potentate, and sovereign. Each of these words has a slightly different connotation, so it is important to use them appropriately. For example, a monarch is someone who rules over a kingdom, while a tribal chief is someone who is the leader of a tribe. Using synonyms correctly can add variety and depth to your writing, making it more interesting and engaging for your readers.