sexagenarian

noun 0.755

fiftysomething

noun 0.748

sixtieth

noun 0.686

fortysomething

noun 0.673

sixty-ninth

noun 0.656

sixty-fourth

noun 0.656

sixty-fifth

noun 0.638

sixty-eighth

noun 0.634

sixty-second

noun 0.633

thirtysomething

noun 0.626

septuagenarian

noun 0.609

sixer

noun 0.601

sixte

noun 0.593

senior citizen

noun 0.593

twentysomething

noun 0.586

seventy-sixth

noun 0.558

sexagesimal

noun 0.558

eighty-sixth

noun 0.556

sextic

noun 0.555

sixth

noun 0.553

senex

noun 0.550

oldster

noun 0.546

sexto

noun 0.546

octogenarian

noun 0.544

senior

noun 0.541

sextuple

noun 0.537

fifty-sixth

noun 0.530

0-60

noun 0.528

nonagenarian

noun 0.528

elderly

noun 0.525

seventieth

noun 0.524

senile

noun 0.523

sweet sixteen

noun 0.523

old fart

noun 0.518

half dozen

noun 0.515

baby boomer

noun 0.515

oldtimer

noun 0.514

old woman

noun 0.514

6mo

noun 0.512

sextet

noun 0.510

old man

noun 0.509

grade six

noun 0.507

somesuch

noun 0.506

old girl

noun 0.505

old folks

noun 0.504

sext

noun 0.504

old lady

noun 0.503

seventy-fourth

noun 0.502

seventy-third

noun 0.501

sextuplet

noun 0.500