| ceaseless(adjective, constant, endless, infinite, continual) |
| constant(steady, stable, regular, endless, infinite) |
| continuous(adjective, constant, endless, infinite, continual) |
| day-and-night(free, endless, infinite, boundless, incessant) |
| day and night(expression, idiom, free, steady, regular) |
| dragged out(expression, endless, infinite, boundless, incessant) |
| dull(endless, incessant, ceaseless) |
| endless(constant, infinite, continual, boundless, unremitting) |
| eternal(constant, endless, infinite, continual, boundless) |
| everlasting(steady, stable, regular, constant, endless) |
| futile(adjective, hopeless, pointless) |
| immeasurable(endless, infinite, boundless, incessant, ceaseless) |
| incessant(constant, endless, infinite, continual, boundless) |
| interminable(adjective, free, steady, stable, regular) |
| interminate(free, endless, infinite, boundless, incessant) |
| limitless(endless, infinite, boundless, incessant, ceaseless) |
| long(endless, incessant, ceaseless) |
| long-drawn-out(endless, incessant, ceaseless) |
| long-winded(endless, incessant, ceaseless) |
| looped(steady, stable, regular, endless, infinite) |