The antonyms for the word "un-deniabilities" are disputable, questionable, doubtful, uncertain, and dubious. These words signify that something can be contradicted, challenged or opposed. They represent an opposite meaning to the term "undeniabilities," which refers to something that is indisputable, certain, undeniable, or irrefutable. When evidence or an argument is presented, it might be subject to scrutiny and criticism, and these words are used to challenge the truthfulness of such claims. Therefore, when faced with an assertion, evaluating the antonyms to "un-deniabilities" can help determine the credibility of the information provided.