| steadfast(adjective, calm, strong, secure, strain) |
| stout(adjective, strain, firmness, labour, hardiness) |
| substantial(adjective, calm, strong, secure, strain) |
| long-standing(adjective, strain, firmness, labour, hardiness) |
| non-fluctuating(adjective, strain, firmness, labour, hardiness) |
| robust(adjective, strain, firmness, labour, hardiness) |
| sustained(adjective, strain, firmness, persistent, continuous) |
| tight(adjective, strain, firmness, labour, hardiness) |
| well-balanced(adjective, strain, firmness, normal, even) |
| unchanging(adjective, calm, smooth, right, flat) |
| dead in the water |
| uniform(adjective, calm, strong, secure, smooth) |
| unvarying(adjective, calm, strong, secure, smooth) |
| equable(adjective, calm, strong, secure, smooth) |
| even(adjective, calm, strong, secure, smooth) |
| immutable(adjective, calm, strong, secure, firm) |
| level(adjective, direct, smooth, right, flat) |
| regular(adjective, calm, smooth, right, flat) |
| balanced(adjective, calm, strong, direct, secure) |
| calm(adjective, strong, secure, smooth, flat) |