Synonyms and related words :
ageless, articulated, catenated, ceaseless, 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, indestructible, infinite, interminable, joined, jointless, linked, monotonous, never-ceasing, never-ending, nonterminating, nonterminous, olamic, perdurable, perennial, periodic, permanent, perpetual, recurrent, repetitive, round-the-clock, running, seamless, sempiternal, serried, smooth, stable, steady, straight, timeless, twenty-four-hour, unbroken, unceasing, undifferentiated, unending, uniform, unintermitted, unintermittent, unintermitting, uninterrupted, unrelieved, unremitting, unstopped, without end