Synonyms to missing link

aborigine, Bronze Age man, Hominidae, Iron Age man, Stone Age man, aboriginal, ancient, antediluvian, anthropoid, ape-man, autochthon, bushman, cave dweller, caveman, earliest inhabitant, first comer, fossil man, hominid, humanoid, indigene, local, local yokel, man of old, native, preadamite, prehistoric man, prehuman, primate, primitive, primitive settler, protohuman, troglodyte, abiding, advanced, advanced in life, advanced in years, age-long, age-old, aged, ageing, ageless, along in years, antiquated, antique, archaic, auld, better, brass hat, bygone, chronic, constant, continuing, dateless, diuturnal, doddering, doting, durable, earlier, early, elder, elderly, enduring, erstwhile, evergreen, fading, fore, forgotten, former, fossil, fossilized, golden-ager, gray, gray with age, gray-haired, gray-headed, grey, grown old, hardy, higher-up, hoar, hoary, immemorial, immutable, intransient, inveterate, l