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