Synonyms of uncompliant

1 Syllable
firm, tough, mule, grim
2 Syllables
willful, steely, die-hard, headstrong, mulish, balky, steadfast, steelier, cussed, rigid, iron, brassbound, fixed, dogged, wayward, fractious
3 Syllables
unyielding, uncomplying, persistent, stiff-necked, untoward, hardheaded, adamant, bullheaded, pigheaded, unbending, incompliant, tenacious, ornery, relentless, self-willed, perverse, rebellious
4 Syllables
intractable, remorseless, implacable, intransigent, obdurate, unrelenting, unshakable, disaffected, cantankerous, single-minded, inflexible, unbendable, pertinacious, refractory, disobedient, persevering, contumacious, determined, recalcitrant
5 Syllables
unreasonable, uncompromising, unmanageable, inalterable, inexorable, adamantine, unadaptable, opinionated, indisciplined, unsubmissive
6 Syllables
insubordinate