| dead set(adjective, determined, resolute, uncompromising, unshakeable) |
| indurate(adjective, determined, resolute, uncompromising, unshakeable) |
| inelastic(adjective, determined, resolute, obstinate, uncompromising) |
| iron-willed(adjective, determined, resolute, uncompromising, unshakeable) |
| persevering |
| persistent(adjective, strong, tough, firm, deliberate) |
| strong |
| unstoppable |
| ass |
| bigot(noun, conservative) |
| bitter-ender(noun, conservative, reactionary, rightist, ultraconservative) |
| contumacious(adjective, tough, firm, determined, unreasonable) |
| hidebound(adjective, determined, resolute, obstinate, uncompromising) |
| immutable(steady, fixed, impassive, inflexible, stubborn) |
| merciless(adjective, persistent, constant, pitiless, unyielding) |
| mule |
| pig-headed(adjective, determined, resolute, obstinate, stubborn) |
| radical(adjective, extremes) |
| reactionary(noun, person) |
| rigorous(severe, stiff, inflexible, strict, obstinate) |