The word "more refutable" implies that something is easily disproven or challenged. Its antonyms would, therefore, be words that indicate an argument or statement is difficult to dispute or disprove. These words could include irrefutable, indisputable, undeniable, proven, or conclusive. By using these antonyms, a speaker or writer can convey a sense of certainty or conviction in their claims, indicating that they have strong evidence to support their position. Additionally, using these antonyms might help persuade someone to accept a particular view or argument, as it presents a strong and compelling case that cannot be easily refuted.