| constant(adjective, direct, continue, steady, regular) |
| unremitting(adjective, adverb, direct, continue, steady) |
| ceaseless(adjective, direct, continue, steady, regular) |
| continuous(adjective, smooth, continue, solid, level) |
| incessant(adjective, direct, continue, steady, regular) |
| round-the-clock(adjective, direct, continue, continuous, continual) |
| unceasing(adjective, continue, persistent, constant, continuous) |
| uninterrupted(adjective, direct, smooth, continue, solid) |
| continual(adjective, continue, steady, stable, regular) |
| perpetual(adjective, continue, steady, stable, regular) |
| steady(adjective, direct, stable, regular, fixed) |
| endless(adjective, direct, continue, persistent, constant) |
| unbroken(adjective, direct, smooth, solid, level) |
| unending(adjective, direct, continue, persistent, constant) |
| around-the-clock(adjective, continue, continual) |
| direct(adjective, smooth, right, solid, level) |
| interminable(adjective, direct, continue, persistent, constant) |
| straight(adjective, adverb, direct, right, level) |
| day-and-night |
| through(adjective, preposition, direct, smooth, solid) |