| strong(adjective, calm, good, strong, hard) |
| firm(noun, adjective, calm, close, strong) |
| sound(noun, adjective, calm, strong, hard) |
| persistent(adjective, strain, firmness, labour, hardiness) |
| stable(adjective, strong, hard, sound, complete) |
| solid(adjective, calm, good, close, strong) |
| stout(adjective, calm, strong, sound, secure) |
| hard(adjective, tough, strain, difficult, solid) |
| stiff(adjective, strain, firmness, labour, hardiness) |
| significant(adjective, strong, importance, big, heavy) |
| consistent(adjective, strain, firmness, labour, hardiness) |
| unfluctuating(adjective, calm, strong, secure, strain) |
| considerable(adjective, great, reasonable, fair, importance) |
| big(adjective, strong, great, sound, tough) |
| durable(adjective, calm, strong, sound, secure) |
| material(noun, adjective, body, hard, solid) |
| abundant(adjective, give, great, strain, big) |
| ample(adjective, give, great, reasonable, fair) |
| steady(adjective, calm, strong, sound, secure) |
| large(adjective, great, fair, big, important) |