Synonyms and related words :
absolute, beyond recall, beyond remedy, binding, certain, changeless, compulsory, conclusive, constant, cureless, decisive, decretory, dictated, enduring, entailed, established, everlasting, fated, fateful, final, fixed, gone, hard-and-fast, immedicable, immutable, imperative, imposed, incommutable, inconvertible, incorrigible, incurable, indefeasible, ineluctable, inert, inescapable, inevasible, inevitable, inexorable, inflexible, inoperable, insusceptible of change, intransmutable, invariable, irreclaimable, irrecoverable, irredeemable, irreformable, irremediable, irreparable, irresistible, irretrievable, irreversible, lasting, lost, mandated, mandatory, must, necessary, noble, nonreturnable, nonreversible, obligatory, past hope, past praying for, peremptory, permanent, prescript, prescriptive, relentless, remediless, required, resistless, reverseless, ruined, settled, sure, sure as death, sure as fate, terminal, ultimate, unalterable, unalterative, unaltered, unavoidable, unchangeable, unchanged, unchanging, uncontrollable, undeflectable, undeviating, undone, unmitigable, unmodifiable, unpreventable, unrelievable, unremitting, unrestorable, unreturnable, unsalvable, unsalvageable, unstoppable, unsusceptible, unvariable, unvarying, unyielding, without appeal