| fast(adjective, calm, strong, secure, tough) |
| weighty(adjective, good, strong, sound, right) |
| robust(adjective, strong, sound, complete, tough) |
| affluent(adjective, easy, rich, large, robust) |
| consequential(adjective, importance, big, heavy, important) |
| great(adjective, importance, valuable, main, notable) |
| steadfast(adjective, calm, strong, secure, strain) |
| sturdy(adjective, calm, strong, hard, sound) |
| enduring(adjective, calm, strong, sound, secure) |
| important(adjective, strong, importance, big, heavy) |
| lasting(adjective, strain, firmness, labour, hardiness) |
| tangible(adjective, body, solid, physical, material) |
| well-established(adjective, strain, firmness, labour, hardiness) |
| concrete(adjective, body, hard, tough, solid) |
| constant(adjective, calm, strong, secure, tough) |
| impregnable(adjective, strain, firmness, labour, hardiness) |
| permanent(adjective, strain, firmness, labour, hardiness) |
| refractory(adjective, strain, firmness, labour, hardiness) |
| rock-solid(adjective, hard, strain, firmness, compact) |
| actual(adjective, solid, physical, material, real) |