Synonyms and related words :
abiding, ageless, articulated, catenated, ceaseless, chattering, coeternal, concatenated, connected, constant, continual, continued, continuing, continuous, cyclical, dateless, direct, endless, eternal, eterne, ever-being, ever-durable, ever-during, everlasting, everliving, featureless, gapless, immediate, immemorial, incessant, indefatigable, indestructible, infinite, interminable, joined, jointless, linked, machine gun, monotonous, never-ceasing, never-ending, nonstop, nonterminating, nonterminous, olamic, oscillating, perdurable, perennial, periodic, permanent, perpetual, persistent, pulsating, rapid, recurrent, regular, remaining, repeated, repetitive, round-the-clock, running, seamless, sempiternal, serried, smooth, stable, staccato, staying, steady, sticking, straight, stuttering, sustained, timeless, twenty-four-hour, unbroken, unchanging, undifferentiated, undying, unending, uniform, unintermitted, unintermittent, unintermitting, uninterrupted, unrelieved, unremitting, unstopped, unvarying, vibrating, without end