| endless(adjective, steady, stable, persistent, constant) |
| perennial(adjective, continue, constant, stability, enduring) |
| undying(adjective, enduring, lasting, everlasting, eternal) |
| unending(adjective, steady, stable, persistent, constant) |
| indestructible(adjective, strong, tough, sturdy, constant) |
| immortal(adjective, perpetual, imperishable) |
| timeless(adjective, steady, constant, endless, lasting) |
| unceasing(adjective, steady, persistent, constant, continuous) |
| continual(adjective, usual, steady, stable, regular) |
| immobile(secure, steady, fixed, immovable, static) |
| ceaseless(adjective, steady, persistent, constant, continuous) |
| imperishable(adjective, fixed, constant, enduring, lasting) |
| chronic(adjective, usual, regular, routine, normal) |
| continuing(adjective, time, continue, fixed, established) |
| long-lasting(adjective, tough, continue, sturdy, constant) |
| deathless |
| long-lived(adjective, continue, continuing, diuturnity) |
| set(verb, adjective, calm, steady, stable) |
| standing(verb, adjective, established, immobile) |
| continuous(adjective, steady, stable, persistent, constant) |