Sisyphean, ageless, amaranthine, articulated, catenated, chattering, coeternal, concatenated, connected, constant, continual, continued, continuing, continuous, cyclical, dateless, day and night, direct, endless, eternal, eterne, ever-being, ever-durable, ever-during, everlasting, everliving, featureless, fixed, frequent, gapless, immediate, immemorial, immortal, incessant, indefatigable, indestructible, infinite, interminable, invariable, joined, jointless, linked, machine gun, monotonous, never-ceasing, never-ending, never-failing, nonstop, nonterminating, nonterminous, olamic, on a treadmill, oscillating, perdurable, perennial, periodic, permanent, perpetual, persistent, pulsating, rapid, recurrent, regular, relentless, repeated, repetitive, round-the-clock, round the clock, running, seamless, sempiternal, serried, smooth, stable, staccato, steady, straight, stuttering, sustained, timeless, twenty-four-hour, unbroken, unceasing, unchanging, undifferentiated, undiminished, unending, unfaltering, uniform, unintermitted, unintermittent, unintermitting, uninterrupted, unrelieved, unremitting, unstopped, untiring, unvarying, unwavering, unwearied, vibrating, without end, world-without-end