| around-the-clock(adjective, continual) |
| nonstop(adjective, constant, continuous, interminable, never-ending) |
| round-the-clock |
| continuous(adjective, constant, endless, infinite, boundless) |
| incessant(adjective, persistent, constant, continuous, endless) |
| unceasing(adjective, constant, continuous, endless, infinite) |
| uninterrupted(adjective, constant, continuous, endless, infinite) |
| ceaseless(adjective, constant, continuous, endless, infinite) |
| constant(adjective, continuous, endless, infinite, boundless) |
| continual(adjective, constant, continuous, interminable, nonstop) |
| dragged out(expression, endless, infinite, boundless, protracted) |
| dull(endless, protracted, incessant, long-winded, ceaseless) |
| endless(adjective, constant, continuous, infinite, boundless) |
| eternal(adjective, constant, continuous, endless, infinite) |
| everlasting(adjective, constant, continuous, endless, infinite) |
| immeasurable(endless, infinite, boundless, incessant, ceaseless) |
| interminable(adjective, free, constant, continuous, endless) |
| interminate(free, continuous, endless, infinite, boundless) |
| limitless(endless, infinite, boundless, incessant, ceaseless) |
| long(endless, protracted, incessant, long-winded, ceaseless) |