Synonyms and related words :
abiding, advanced, advanced in life, advanced in years, age-long, age-old, along in years, ancient, antediluvian, antique, chronic, constant, continuing, developed, diuturnal, doddering, durable, elderly, enduring, evergreen, full-blown, full-fledged, full-grown, fully developed, getting on, gray, gray with age, gray-haired, gray-headed, grey, grown old, hardy, hoar, hoary, immutable, in full bloom, intransient, inveterate, lasting, long-lasting, long-lived, long-standing, long-term, longeval, longevous, macrobiotic, mature, matured, mellow, mellowed, of long duration, of long standing, old, old as Methuselah, olden, patriarchal, pensioned off, perdurable, perduring, perennial, permanent, perpetual, persistent, persisting, remaining, retired, ripe, ripened, seasoned, sempervirent, senectuous, senescent, senile, senior, stable, staying, steadfast, superannuated, tempered, timeworn, tottery, tough, unfading, venerable, vital, white, white with age, white-bearded, white-crowned, white-haired, wrinkled, wrinkly, years old