| continuous(adjective, calm, sound, smooth, right) |
| durable(adjective, calm, strong, secure, tough) |
| endless(adjective, sound, continue, certain, determined) |
| unalterable(adjective, calm, strong, secure, strain) |
| unceasing(adjective, strong, continue, firm, determined) |
| unremitting(adjective, strong, sound, continue, firm) |
| uninterrupted(adjective, calm, direct, sound, smooth) |
| unyielding(adjective, strong, secure, strain, flat) |
| unvarying(adjective, calm, strong, secure, smooth) |
| eternal(adjective, continue, certain, pause, steady) |
| everlasting(adjective, continue, steady, stable, fixed) |
| loyal(adjective, good, close, strong, kind) |
| rigid(adjective, strain, still, fixed, firmness) |
| sustained(adjective, strain, firmness, persistent, continuous) |
| settled(adjective, strong, strain, flat, firm) |
| changeless(adjective, change, firm, solid, certain) |
| stabile(adjective, calm, strong, secure, smooth) |
| staunch(noun, adjective, calm, good, close) |
| unending(adjective, continue, steady, stable, persistent) |
| long-standing(adjective, strain, firmness, labour, hardiness) |