Synonyms of extinct

1 Syllable

out, ex, past, gone, late, lost, cold, démodé, void, dead, passé

2 Syllables

unknown, run-off, has-been, old-school, offed, ruined, paster, lapsed, ended, asleep, doused, deadest, fallen, azoic, deader, defunct, old-hat, passer, archaic

3 Syllables

lifeless, mineral, departed, nonextant, outmoded, deceased, disused, vanquished, vanished, ungrounded, bygone, demoded, old-fangled, dinosaur, unstylish, insentient

4 Syllables

terminated, nonanimal, out-of-fashion, superseded, nonexistent, extinguished, inactive, inorganic, old-fashioned, abolished, out-of-style, disappeared, obsolete

5 Syllables

exterminated, inanimate, anachronistic, exanimate, nonvegetable