Synonyms and related words :
absolute, actual, admitting no question, apparent, axiomatic, clear, clear as crystal, clear-cut, confirmable, crystal-clear, definite, demonstrable, demonstratable, discernible, distinct, evident, explicit, express, factual, historical, inappealable, incontestable, incontrovertible, indisputable, indubitable, inescapable, irrefragable, irrefutable, manifest, noticeable, observable, obvious, open-and-shut, palpable, patent, perceivable, perceptible, perspicuous, plain, plain as day, provable, proverbial, real, seeable, self-explaining, self-explanatory, tangible, testable, to be seen, TRUE, unanswerable, unconfutable, undeniable, unimpeachable, unmistakable, unquestionable, unrefutable, verifiable, visible