| sustained(verb, adjective, persistent, enduring, lasting) |
| timeless(adjective, constant, endless, indefinite, lasting) |
| uninterrupted(adjective, enduring, continuity, perpetual) |
| unvarying(adjective, continuous) |
| steady(adjective, familiar, continuous, established, long-established) |
| immutable(adjective, stable, constant, stability, enduring) |
| interminable(adjective, continuous, durable) |
| invariable(adjective, stable, constant, continuous, stability) |
| long-standing(adjective, continue, persistent, continuous, hardened) |
| never-ending(adjective, enduring, perpetual) |
| connected(adjective, continuous) |
| continued(continuous, lasting, permanent, everlasting, uninterrupted) |
| cyclical(adjective, regular, routine, continuous, occasional) |
| diuturnal(stability, diuturnity) |
| indestructible(adjective, stable, constant, enduring, lasting) |
| macrobiotic |
| monotonous(adjective, continuous) |
| repetitive(adjective, continuous) |
| unbroken(adjective, continuous, continuity) |
| unfading(stable, constant, enduring, lasting, permanent) |