nonagenarian

noun 0.795

septuagenarian

noun 0.715

eightieth

noun 0.678

sexagenarian

noun 0.631

oldster

noun 0.616

senior citizen

noun 0.584

centenarian

noun 0.580

elderly

noun 0.576

codger

noun 0.570

octal

noun 0.569

eighty-first

noun 0.563

eighty-seventh

noun 0.559

gerontologist

noun 0.553

old man

noun 0.549

octavo

noun 0.549

old fart

noun 0.548

sixtysomething

noun 0.544

old folks

noun 0.542

old woman

noun 0.539

octad

noun 0.537

octagon

noun 0.530

octuple

noun 0.527

octet

noun 0.527

old lady

noun 0.524

elderhood

noun 0.524

oldtimer

noun 0.524

octa

noun 0.522

old fogey

noun 0.516

senior

noun 0.512

8vo

noun 0.509

eighty-fifth

noun 0.508

geriatrician

noun 0.507

eighty-ninth

noun 0.506

baby boomer

noun 0.505

elder statesman

noun 0.505

pensioner

noun 0.505

eighty-sixth

noun 0.501

eighth

noun 0.501