Redargution is a seldom used word that means to refute or contradict an argument or claim. This word has several synonyms that can be used interchangeably in its place. One such synonym is rebuke, which means to express sharp disapproval or criticism of someone's actions or behavior. Another synonym is repudiation, which is the act of rejecting or denying the validity of something. Refutation is another suitable synonym for redargution, as it means to prove a claim or argument to be false or incorrect. Lastly, disproof can also be used in place of redargution as it implies evidence or proof that contradicts a claim or argument.