Synonyms and related words :
adamant, adamantine, beyond control, breachy, bullheaded, contumacious, defiant, fractious, headstrong, immovable, immutable, incorrigible, indocile, indomitable, inductile, inelastic, inextensible, inextensile, inextensional, inflexible, insubordinate, insuppressible, intractile, intransigent, irrepressible, irresilient, mulish, noncooperating, noncooperative, nonelastic, nonstretchable, obstreperous, out of hand, pertinacious, perverse, recalcitrant, refractory, resistant, resisting, restive, self-willed, shrewish, stubborn, tough, unalterable, unbending, unbiddable, uncompliant, uncontrollable, uncooperative, undisciplined, unextendible, unextensible, unflexible, ungiving, ungovernable, unlimber, unmalleable, unmanageable, unmoldable, unpliable, unpliant, unruly, unsubmissive, untractable, unyielding, wild, willful