Refuter is a word commonly used to describe someone who disproves or negates something. However, there are many other words that can be used as synonyms for refuter. One such word is debunker, which also means to expose as false or exaggerated. Another synonym for refuter is discreditor, which implies discrediting or disapproving of something. Other words that can be used as synonyms for refuter include contester, denyer, invalidator, and rebuttalist. These are all words that indicate a person's ability to argue against something or point out its flaws. Ultimately, the choice of synonym will depend on the specific context of application.