The word "renegement" has very few synonyms due to its rarity and limited usage in the English language. Some words that can be used interchangeably with "renegement" include "renege," "backtrack," "retreat," "go back on one's word," and "revoke." The word "renegement" is often used to describe the act of breaking a promise or going back on one's word, and these synonyms all convey a similar meaning. However, it is important to note that each of these synonyms may have slightly different connotations or implications depending on the context in which they are used.