diluvian

adj 0.740

postdiluvian

adj 0.719

prehistoric

adj 0.701

diluvial

adj 0.681

ancient

adj 0.679

prehistorical

adj 0.673

primeval

adj 0.628

archaic

adj 0.626

paleolithic

adj 0.619

prelapsarian

adj 0.604

antiquary

adj 0.601

antique

adj 0.599

antebellum

adj 0.599

antiquated

adj 0.598

age-old

adj 0.589

stone-age

adj 0.584

atavistic

adj 0.583

antiquarian

adj 0.580

preglacial

adj 0.571

pretechnological

adj 0.564

neolithic

adj 0.561

primordial

adj 0.560

preantibiotic

adj 0.557

premodern

adj 0.556

way back when

adj 0.556

old-world

adj 0.551

anachronic

adj 0.545

olden

adj 0.545

ancestral

adj 0.543

paleontological

adj 0.541

long ago

adj 0.541

vintage

adj 0.541

archaeological

adj 0.540

anachronistic

adj 0.539

postlapsarian

adj 0.538

olde worlde

adj 0.538

antenatal

adj 0.535

old-fashioned

adj 0.534

prehispanic

adj 0.533

terranean

adj 0.533

primitive

adj 0.532

bygone

adj 0.529

postglacial

adj 0.525

historic

adj 0.524

troglodytic

adj 0.523

illuvial

adj 0.520

old

adj 0.519

prescientific

adj 0.517

retro

adj 0.517

apocalyptic

adj 0.516

historical

adj 0.514

erstwhile

adj 0.511

medieval

adj 0.510

pre-war

adj 0.510

megalithic

adj 0.510

pluvial

adj 0.510

aforegoing

adj 0.508

subterranean

adj 0.508

old as the hills

adj 0.508

unmodern

adj 0.504

fossilized

adj 0.501

prior

adj 0.501

presolar

adj 0.500