| inflexibility(noun, state, quality, resist, perseverance) |
| rigidity(noun, state, quality, resist, perseverance) |
| stubbornness(noun, state, quality, resist, perseverance) |
| obduracy(noun, state, quality, resist, perseverance) |
| obstinacy(noun, perseverance, stubbornness, inflexibility, rigor) |
| relentlessness(noun, state, quality, resist, perseverance) |
| inexorability(noun, state, quality, resist, perseverance) |
| hardness |
| implacability(noun, state, quality, resist, perseverance) |
| incompliance(noun, state, quality, resist, perseverance) |
| incompliancy(noun, state, quality, resist, perseverance) |
| inexorableness(noun, state, quality, resist, perseverance) |
| intransigence(noun, state, quality, resist, perseverance) |
| intransigency(noun, state, quality, resist, perseverance) |
| pertinacity(noun, perseverance, obstinacy, stubbornness, inflexibility) |
| rigidness(noun, state, quality, resist, perseverance) |
| rigor(noun, obstinacy, stubbornness) |
| rigour |
| severity |
| callousness(ruthlessness, pitilessness, mercilessness) |