| density(noun, protection, security, hardness, stiffness) |
| determination(noun, firmness, severity, strictness, obstinacy) |
| doggedness(noun, perseverance, obstinacy, stubbornness, inflexibility) |
| durability(noun, firmness, protection, security, toughness) |
| endurance(firmness, stiffness) |
| exactitude(severity, harshness, conformity, strictness, conservatism) |
| fixedness(noun, protection, security, hardness, density) |
| immobilization(stillness, motionlessness, immovability) |
| impliability(noun, protection, security, hardness, density) |
| inclemency(noun, severity, harshness, conformity, strictness) |
| intractibility(noun, hardness) |
| literalness |
| persistence |
| pertinacity(noun, perseverance, obstinacy, stubbornness, inflexibility) |
| puritanism(severity, strictness, sternness) |
| quiescence(calm, stillness, immobility) |
| remorselessness(noun, state, quality, resist, perseverance) |
| renitency |
| rigorism |
| security(noun, firmness, protection, stiffness, tightness) |