mature
grizzled
over the hill
long-lived
agedness
hoary
rusty
outdated
senior stage
pensioner age
golden years
geriatric period
ancient
dated
senior years
vintage
mature age
seniority
late life
elderliness
established
elder
aging
elderly
timeworn
classic
third age
wisened age
vintage age
declining years
obsolete
wizened
elderhood
long in the tooth
antique
elder phase
time of life
senior
golden era
retirement age
advanced age
oldster stage
autumn years
decrepit
superannuation age
matured stage
silver age
aged
senescence