Ascendence is a powerful word that describes superiority or domination over others. There are several synonyms for the word, including supremacy, dominance, control, influence, authority, and power. These words all convey a sense of being in charge and having the ability to dictate outcomes. Other synonyms for ascendence include rule, command, sway, and leadership. Each of these words has a slightly different connotation, but they all suggest a position of power and control. When used in writing or speech, it's important to choose the synonym that best fits the context and tone of the message you're trying to convey.