| habitual(adjective, common, steady, regular, normal) |
| recurring(adjective, regular, normal, continuous, repetition) |
| straight(adjective, continuous, continual, nonstop) |
| timeless(adjective, continue, steady, persistent, constant) |
| undying(adjective, constant, abundant, continuous, permanent) |
| ageless |
| connected(adjective, steady, persistent, constant, continuous) |
| cyclical(adjective, continuous) |
| dateless |
| even(verb, adjective, sound, steady, regular) |
| immortal(adjective, constant, abundant, endless, infinite) |
| invariable(adjective, persistent, continuous, endless, relentless) |
| periodic(adjective, regular, normal, recurrent) |
| stable(adjective, steady, regular, persistent, even) |
| sustained(adjective, persistent, constant, continuous, unyielding) |
| unfailing(adjective, strong, continue, firm, determined) |
| unrelieved |
| around-the-clock(adjective, continue) |
| changeless |
| coeternal |