| stubborn(adjective, determined, resolute, uncompromising, characteristic) |
| obdurate(adjective, strong, hard, tough, severe) |
| unyielding(adjective, mean, strong, hard, tough) |
| inflexible(adjective, mean, strong, hard, tough) |
| uncompromising(adjective, mean, hard, tough, severe) |
| resolute(adjective, strong, hard, tough, rough) |
| firm(noun, adjective, mean, strong, hard) |
| dogged(adjective, mean, strong, hard, tough) |
| determined(adjective, strong, tough, firm, intense) |
| rigid(adjective, mean, hard, tough, moderate) |
| adamant(adjective, mean, strong, hard, tough) |
| mulish(adjective, mean, strong, hard, tough) |
| tenacious(adjective, strong, firm, intense, resist) |
| headstrong(adjective, strong, hard, tough, rough) |
| intransigent(adjective, firm, determined, resolute, stubborn) |
| immovable(adjective, mean, hard, determined, usual) |
| recalcitrant(adjective, control, order, resist, violent) |
| unbending(adjective, mean, hard, tough, severe) |
| refractory(adjective, control, order, resist, determined) |
| contrary(adjective, difficult, determined, resolute, antagonistic) |