| unalterable(adjective, calm, strong, secure, strain) |
| cool(verb, adjective, characteristic, calm, quiet) |
| conservative(adjective, calm, soft, reasonable, moderate) |
| staying(adjective, strain, firmness, labour, hardiness) |
| well-balanced(adjective, sound, strain, rational, stable) |
| resolute(adjective, calm, close, strong, secure) |
| immune(adjective, strain, firmness, safe, labour) |
| proof(adjective, calm, strain, restrained, firmness) |
| robust(adjective, strong, sound, secure, tough) |
| stabilized(adjective, strain, firmness, labour, hardiness) |
| surefooted(adjective, strain, firmness, labour, hardiness) |
| tolerant(adjective, calm, soft, reasonable, gentle) |
| abundant(adjective, strain, firmness, labour, hardiness) |
| continuous(adjective, calm, quiet, quality, complete) |
| determined(adjective, good, strong, easy, severe) |
| impregnable(adjective, strain, firmness, safe, labour) |
| non-fluctuating(adjective, strain, firmness, labour, hardiness) |
| solid(adjective, calm, good, strong, sound) |
| balanced(adjective, calm, strong, sound, secure) |
| dependable(adjective, calm, good, close, strong) |