Synonyms of unending

2 Syllables

undying, nonstop, termless, boundless, constant, endless, steady

3 Syllables

ceaseless, perpetual, unended, eternal, round-the-clock, bottomless, aeonian, day-and-night, unwaning, timeless, long-drawn-out, continual, immortal, abysmal, unplumbed, limitless, incessant, continuous, unceasing

4 Syllables

unremitting, around-the-clock, undefined, oft-repeated, sempiternal, never-ending, measureless, all-embracing, everlasting, diffusive, unmeasured, infinite, never-ceasing, sustainable

5 Syllables

unfathomable, uncalculable, self-perpetuating, amaranthine, interminate, supertemporal, interminable, illimitable, uninterrupted