- antediluvian
- adj1. primeval, primal, prehistoric, preglacial, preadamic, Noachian, Noachic, Noachical; eolithic, Paleolithic, Mesolithic, Neolithic, before the Flood or Deluge; primary, prime, pristine, early, earliest, initial, first; autochthonal, autochthonous, aboriginal.2. antiquated, antique, fossilized, fossil-like, ancient, archaic; superannuated, oldest, age-old, immemorial, old, old as the hills, time worn, elderly, aged; atavistic, old-fashioned, old-fogyish, old-time, bygone, unmodern, quaint, old-world; out-of-date, outmoded, passe, obsolescent, obsolete.3. primitive, primordial, primigenial, elementary, simple, uncomplicated; rudimentary, rudimental, embryonic, undeveloped; crude, unrefined, coarse, rough, unpolished; uncivilized, barbaric.n4. prehistoric man, Cro-Magnon, preadamite, cave man, ape-man, pithecanthrope, troglodyte; primitive, autochthon, aboriginal, Australian Inf. boong.5. ancient, venerable, patriarch, elder, old timer, granny, Methuselah, Inf. oldster, Sl. relic; old fogy, Inf. fuddy-duddy, Inf. stick-in-the-mud.
A Note on the Style of the synonym finder. 2014.