never-ending Synonyms

constant unremitting incessant unceasing perpetual ceaseless persistent unbroken timeless perennial sustained steady permanent interminable relentless sempiternal unlimited without end unrelieved unfading nonstop unchanging unending undying uninterrupted vast unrelenting perdurable limitless lasting eterne enduring endless deathless continuous continuing continual boundless bottomless amaranthine eternal everlasting abiding infinite inextinguishable inexhaustible inestimable indestructible imperishable immortal