Synonyms and related words :
absolute, apodictic, bound, certain, clear, clear and distinct, clear as day, conclusive, decisive, definite, determinate, fated, fateful, indefeasible, ineludible, inescapable, inevasible, inevitable, inexorable, inflexible, irresistible, irrevocable, necessary, perfectly sure, positive, predestined, predetermined, relentless, resistless, sure, sure as death, sure as fate, sure-enough, TRUE, unambiguous, unavoidable, uncontrollable, undeflectable, unequivocal, unevadable, univocal, unmistakable, unpreventable, unstoppable, unyielding