Synonyms of eternal in English:

eternal


See definition of eternal

adjective

1‘the hope of eternal happiness’

SYNONYMS
everlasting, never-ending, endless, without end, perpetual, undying, immortal, deathless, indestructible, imperishable, immutable, abiding, permanent, enduring, infinite, boundless, timeless
rare sempiternal, perdurable
ANTONYMS

transient

2‘the price of freedom is eternal vigilance’

SYNONYMS
constant, continual, continuous, perpetual, persistent, sustained, unremitting, relentless, unrelenting, unrelieved, uninterrupted, unbroken, unabating, interminable, never-ending, non-stop, round-the-clock, always-on, incessant, endless, ceaseless
ANTONYMS

intermittent