undisputable, unarguable, inarguable, realistic, objective, incontestible, definitely, accomplished, unchallengeable, authentic, unassailable, firm, factual, trusted, accurate, hard, true, unanswerable
certain (part of speech: adjective)
clear, confident, steadfast, definite, decisive, incontestable, assured, indubitable, irrefragable, undeniable, veritable, irrefutable, decided, trusting, patent, doubtless, unmistakable, convinced, positive, sure, undoubted, unequivocal, unquestionable, set, absolute, incontrovertible, certain
positive (part of speech: adjective)
- Such is the indisputable fact. - "Tropic Days", E. J. Banfield.
- Here I have introduced cash; I have been led to do so by a desire to place, side by side, two objects of exchange, of a perfect and indisputable equality of value. - "Essays on Political Economy", Frederic Bastiat.
- However that may be, there are three points as to these buildings which are indisputable, and which are also most interesting to any lover of English architecture. - "The Charm of Oxford", J. Wells.