| unceasing(adjective, stable, persistent, constant, continuous) |
| unwavering(adjective, calm, strong, secure, flat) |
| imperishable(adjective, constant, enduring, lasting, permanent) |
| indestructible(adjective, tough, stable, sturdy, constant) |
| long-lasting(adjective, tough, continue, sturdy, enduring) |
| long-lived(adjective, continue, persistent, hardened, lasting) |
| long-standing(adjective, continue, steady, even, hardened) |
| undying(adjective, enduring, lasting, permanent, everlasting) |
| unfaltering(adjective, complete, firm, total, solid) |
| perdurable(adjective, calm, strong, continue, substantial) |
| persevering(verb, adjective, set, strong, flat) |
| remaining(verb, adjective, persistent, enduring, lasting) |
| timeless(adjective, lasting, permanent, everlasting, eternal) |
| unchangeable(adjective, calm, strong, secure, flat) |
| unending(adjective, stable, persistent, continuous, endless) |
| chronic(adjective, fixed, persistent, old, continuous) |
| continuous(adjective, certain, persistent, constant, reliable) |
| living(verb, adjective, living, existing) |
| sure(adjective, calm, strong, complete, secure) |
| surviving(verb, adjective, living, enduring, lasting) |