Another word for eternal
endless, interminable, continual, unbroken, continuous, continued, unceasing, incessant, ceaseless, constant, unending, enduring, persistent, always, relentless, uninterrupted, unremitting; see also perpetual 1.
everlasting, unending, endless, perpetual, never-ending, termless, infinite, indefinite, permanent, ageless, boundless, timeless, immortal, deathless, undying, forever, interminable, indeterminable, dateless, immeasurable, unfading, indestructible, always, limitless, imperishable, illimitable, indomitable, unconquerable, unyielding, eonian, sempiternal, to one's dying day, till doomsday, for ever and a day, for ever and ever; see also perpetual 1.
Another word for eternaladjective
Without beginning or end:infinite, sempiternal. See limited
Existing or occurring without interruption or end:around-the-clock, ceaseless, constant, continual, continuous, endless, everlasting, incessant, interminable, nonstop, ongoing, perpetual, persistent, relentless, round-the-clock, timeless, unceasing, unending, unfailing, uninterrupted, unremitting. See continue
Existing unchanged forever:ageless, dateless, timeless. (Archaic) eterne. See change
Enduring for all time:amaranthine, ceaseless, endless, everlasting, immortal, never-ending, perpetual, unending, world without end. (Archaic) eterne. See continue