THESAURUS
unalterable
adamant, adamantine, cast-iron, changeless, constant, dour, firm, fixed, flinty, grim, hard, hard-core, immovable, immutable, implacable, impliable, inalterable, incommutable, inconvertible, indefeasible, inductile, inelastic, inert, inexorable, inextensible, inextensile, inextensional, inflexible, insusceptible of change, intractable, intractile, intransigent, intransmutable, invariable, iron, irreconcilable, irresilient, irretrievable, irreversible, irrevocable, lasting, noble, nonelastic, nonreturnable, nonreversible, nonstretchable, permanent, relentless, reverseless, rigid, rigorous, rock-ribbed, steely, stern, stiff, stubborn, unaffected, unalterative, unaltered, unbending, unchangeable, unchanged, unchanging, uncompromising, undeflectable, undeviating, unextendible, unextensible, unflexible, ungiving, unlimber, unmalleable, unmodifiable, unmovable, unmoved, unpliable, unpliant, unrelenting, unremitting, unrestorable, unreturnable, unsusceptible, untractable, unvariable, unvarying, unyielding
ROGET THESAURUS
unalterable
Stability
N
stability, immutability, unchangeability unchangeableness, constancy, stable equilibrium, immobility, soundness, vitality, stabiliment, stiffness, ankylosis, solidity, aplomb, establishment, fixture, rock, pillar, tower, foundation, leopard's spots, Ethiopia's skin, permanence, obstinacy, unchangeable, immutable, unaltered,
unalterable, not to be changed, constant, permanent, invariable, undeviating, stable, durable, perennial, fixed, steadfast, firm, fast, steady, balanced, confirmed, valid, fiducial, immovable, irremovable, riveted, rooted, settled, established, vested, incontrovertible, stereotyped, indeclinable, tethered, anchored, moored, at anchor, on a rock, rock solid, firm as a rock, firmly seated, firmly established, deep-rooted, ineradicable, inveterate, obstinate, transfixed, stuck fast, aground, high and dry, stranded, stuck, jammed, unremovable, quiescent, deterioration, indefeasible, irretrievable, intransmutable, incommutable, irresoluble, irrevocable, irreversible, reverseless, inextinguishable, irreducible, indissoluble, indissolvable, indestructible, undying, imperishable, incorruptible, indelible, indeciduous, insusceptible, insusceptible of change, Int, stet, littera scripta manet.