Synonyms and related words :
adamant, adamantine, ass, bigot, bitter-ender, brawler, bullethead, cast-iron, defendant, diehard, disputant, dissentient, dissident, dogmatist, donkey, dour, fanatic, firm, flinty, grim, hard, hard-core, hardnose, immovable, immutable, implacable, impliable, inelastic, inexorable, inflexible, intransigeant, iron, irreconcilable, last-ditcher, litigant, maverick, mule, naysayer, negativist, noncooperator, objector, obstructionist, obstructive, opposer, oppositionist, perverse fool, pighead, plaintiff, positivist, protester, purist, quarreler, relentless, resister, rigid, rigorous, rock-ribbed, scrapper, standpat, standpatter, steely, stern, stickler, stiff, unaffected, unalterable, unbending, unchangeable, uncompromising, ungiving, unmoved, unrelenting, unyielding, wrangler