| perpetual(adjective, continue, steady, persistent, constant) |
| incessant(adjective, strong, continue, firm, determined) |
| constant(adjective, strong, continue, firm, determined) |
| continual(adjective, continue, persistent, constant, continuous) |
| ceaseless(adjective, continue, steady, persistent, constant) |
| unending(adjective, continue, steady, persistent, constant) |
| everlasting(adjective, continue, steady, stable, persistent) |
| unremitting(adjective, strong, continue, firm, determined) |
| eternal(adjective, continue, pause, steady, persistent) |
| continuous(adjective, continue, steady, persistent, constant) |
| endless(adjective, continue, steady, stable, persistent) |
| interminable(adjective, continue, steady, persistent, constant) |
| persistent(adjective, strong, continue, firm, determined) |
| uninterrupted(adjective, continue, steady, persistent, constant) |
| permanent(adjective, steady, persistent, constant, continuous) |
| never-ending(adjective, constant, continuous, endless, infinite) |
| steady(adjective, strong, firm, determined, persistent) |
| lasting(adjective, persistent, constant, continuous, endless) |
| ageless(adjective, lasting, permanent, everlasting, unending) |
| relentless(adjective, continue, steady, persistent, constant) |