| stubborn(adjective, determined, characteristic, quality, stubbornness) |
| obdurate(adjective, strong, hard, tough, severe) |
| unyielding(adjective, mean, strong, hard, tough) |
| obstinate(adjective, mean, hard, severe, resist) |
| unrelenting(adjective, mean, strong, hard, tough) |
| inflexible(adjective, mean, strong, hard, tough) |
| intransigent(adjective, firm, deliberate, determined, unreasonable) |
| uncompromising(adjective, mean, hard, severe, deliberate) |
| pigheaded(adjective, mean, hard, tough, resist) |
| relentless(adjective, mean, strong, hard, tough) |
| rigid(adjective, mean, strong, hard, tough) |
| unbending(adjective, mean, strong, hard, tough) |
| dogged(adjective, mean, hard, tough, firm) |
| adamant(adjective, mean, strong, hard, tough) |
| bullheaded(adjective, strong, hard, tough, firm) |
| headstrong(adjective, tough, firm, resist, determined) |
| inexorable(adjective, mean, strong, hard, tough) |
| mulish(adjective, mean, strong, hard, tough) |
| opinionated(adjective, tough, firm, determined, resolute) |
| perverse(adjective, mean, hard, tough, resist) |