| enduringness |
| permanency(noun, stability, continuity, perpetuity) |
| perpetuity(noun, endurance, stability, persistence, steadiness) |
| soundness(noun, health, support, control, force) |
| steadfastness(noun, support, control, strength, balance) |
| sturdiness(noun, health, support, control, force) |
| changelessness(noun, stability) |
| continuity(noun, strength, resolution, fortitude, stamina) |
| everlastingness |
| health(noun, force, body, power, strength) |
| interminability |
| persistency(noun, stability) |
| standing(noun, strength, resolution, fortitude, stamina) |
| autonomy(noun, sustainability) |
| backbone(noun, health, support, control, time) |
| cohesion(noun, support, control, strength, balance) |
| fixedness(noun, protection, security, rigidity, hardness) |
| hardiness(noun, health, force, body, power) |
| impenetrability(noun, resistance, protection, security, rigidity) |
| invariableness(noun, stability) |