Synonyms of 'adamant'

adamantine, cast-iron, dour, firm, flinty, frozen, granitic, grim, hard, hard-core, immobile, immotile, immovable, immutable, implacable, inductile, inelastic, inexorable, inextensible, inflexible, intractable, intransigent, iron, irreconcilable, irremovable, lithic, obdurate, pat, petrogenic, relentless, rigid, rigorous, Rock, rock-ribbed, slaty, stationary, Stern, stiff, stone, stubborn, unaffected, unalterable, unbending, unchangeable, uncompromising, unlimber, unmalleable, unmoved, unmoving, unrelenting, unyielding