Synonyms and related words :
absolute, actual, admitting no question, confirmable, demonstrable, demonstratable, factual, historical, inappealable, incontestable, incontrovertible, indisputable, indubitable, irrefragable, irrefutable, provable, real, self-evident, unanswerable, unconfutable, undeniable, unimpeachable, unquestionable, unrefutable, verifiable|