List of immemorial synonyms and immemorial related words.
acknowledged, admitted, age-old, ageless, ancient, antique, auld, ceaseless, coeternal, constant, continual, continuous, conventional, customary, dateless, early, elderly, endless, erstwhile, established, eternal, eterne, ever-being, ever-durable, ever-during, everlasting, everliving, fixed, folk, fore, former, hallowed, handed down, heroic, hoary, incessant, indestructible, infinite, interminable, inveterate, late, legendary, long-established, long-standing, mythological, never-ceasing, never-ending, nonstop, nonterminating, nonterminous, of long standing, of old, of the folk, of yore, olamic, old, old as Methuselah, old as history, old as time, old-time, olden, once, onetime, oral, past, perdurable, permanent, perpetual, prehistoric, prescriptive, previous, primeval, primitive, prior, quondam, received, recent, recognized, rooted, sempiternal, sometime, steady, then, time-honored, timeless, traditional, tried and true, true-blue, unceasing, understood, unending, unintermitting, uninterrupted, unremitting, unwritten, venerable, without end, worshipful