incontestable

Synonyms

accomplished, certain, inarguable, incontrovertible, indisputable, indubitable, irrefragable, irrefutable, positive, sure, unanswerable, unarguable, unchallengeable, undeniable, unquestionable;

Antonyms

answerable, arguable, contradictable, controvertible, debatable, disputable, doubtable, moot, negotiable, problematic (also problematical), questionable, refutable;

Near Antonyms

controversial, debated, disputed;

doubtful, dubious, iffy, inconclusive, indecisive, uncertain;

ambiguous, equivocal;

hypothetical, speculative, theoretical (also theoretic);

Related Words

unambiguous, unequivocal;

absolute, clear, conclusive, decisive, definite, hands-down;

uncontested, uncontradicted, undisputed, unquestioned;