| stubborn(adjective, characteristic, quality, stubbornness, resolute) |
| obstinate(adjective, strong, hard, tough, rough) |
| intractable(adjective, strong, hard, tough, rough) |
| pigheaded(adjective, tough, firm, resist, determined) |
| unruly(adjective, tough, difficult, violent, wild) |
| unyielding(adjective, hard, tough, rough, harsh) |
| dogged(adjective, tough, firm, resist, determined) |
| self-willed(adjective, tough, firm, determined, resolute) |
| mulish(adjective, tough, firm, resist, determined) |
| refractory(adjective, tough, firm, determined, negative) |
| perverse(adjective, mean, tough, firm, resist) |
| wilful(adjective, determined, resolute, uncompromising, unshakeable) |
| willful(adjective, tough, difficult, resist, passionate) |
| determined(adjective, tough, firm, careless, deliberate) |
| obdurate(adjective, hard, tough, rough, harsh) |
| contumacious(adjective, tough, firm, deliberate, determined) |
| inflexible(adjective, strong, hard, tough, rough) |
| disobedient(adjective, cross, wild, capricious, unruly) |
| froward(noun, adjective, cross, passionate, deliberate) |
| recalcitrant(adjective, tough, firm, violent, negative) |