| hardness(noun, cruelty, impenitence) |
| ruthlessness(noun, cruelty, coldness, hardheartedness, pitilessness) |
| callousness(noun, cruelty, coldness, hardheartedness, ruthlessness) |
| relentlessness(noun, state, quality, resist, perseverance) |
| cruelty(noun, coldness, hardheartedness, ruthlessness, pitilessness) |
| harshness(noun, pitilessness, mercilessness, relentlessness) |
| implacability(noun, state, quality, resist, perseverance) |
| incompliance(noun, state, quality, resist, perseverance) |
| incompliancy(noun, state, quality, resist, perseverance) |
| inexorability(noun, state, quality, resist, perseverance) |
| intransigence(noun, state, quality, resist, perseverance) |
| mercilessness(noun, coldness, hardheartedness, ruthlessness, pitilessness) |
| obduracy(noun, state, quality, resist, perseverance) |
| stubbornness(noun, state, quality, resist, perseverance) |
| die-hardism(noun, state, quality, resist, perseverance) |
| grimness(noun, state, quality, resist, perseverance) |
| impenitence(noun, impenitence) |
| implacableness(noun, state, quality, resist, perseverance) |
| inflexibility(noun, state, quality, resist, perseverance) |
| intransigency(noun, state, quality, resist, perseverance) |