Mordaciously is a word used to describe something that is cruel or harshly critical. Some synonyms for this word include acrimoniously, caustically, scathingly, cuttingly, and bitingly. All of these words convey a sense of biting wit or sarcasm, as well as an attitude of disdain or contempt. Other synonyms for mordaciously include harshly, fiercely, bitterly, and spitefully. When choosing a synonym for mordaciously, it's important to consider the context in which the word is being used, as well as the tone and style of the writer or speaker. Ultimately, the goal is to find a word that accurately reflects the intended meaning while also being appropriate for the given situation.