The word coronate means to crown or to bestow a title upon. The antonyms for coronate would be to dethrone, uncrown or depose. These words refer to the opposite action of removing someone from their position of power or taking away their title. Other antonyms for coronate could include demote, downgrade or discharge. These words all indicate a lowering of someone's status or rank, rather than promoting them to a higher position. Using antonyms can help to clarify meaning and provide a more nuanced understanding of a word's definition.