| perpetual(adjective, strain, firmness, labour, hardiness) |
| unmoving(adjective, adverb, move, calm, quiet) |
| conservative(adjective, strain, firmness, labour, hardiness) |
| durable(adjective, strain, firmness, labour, hardiness) |
| enduring(adjective, strain, firmness, labour, hardiness) |
| lasting(adjective, strain, firmness, labour, hardiness) |
| stabile(adjective, strain, firmness, labour, hardiness) |
| staying(adjective, strain, firmness, labour, hardiness) |
| stout(adjective, strain, firmness, labour, hardiness) |
| substantial(adjective, strain, firmness, labour, hardiness) |
| sustained(adjective, strain, firmness, labour, hardiness) |
| tight(adjective, strain, firmness, labour, hardiness) |
| unalterable(adjective, strain, firmness, labour, hardiness) |
| unyielding(adjective, strain, firmness, labour, hardiness) |
| long-standing(adjective, strain, firmness, labour, hardiness) |
| robust(adjective, strain, firmness, labour, hardiness) |
| sedentary(adjective, lazy, inactive, inert, motionless) |
| inert(adjective, calm, quiet, smooth, moving) |
| static(adjective, calm, quiet, secure, smooth) |
| standing(verb, adjective, calm, quiet, moving) |