advanced age advanced years age of retirement an incurable disease caducity childishness debility decline decline of life declining years decrepitude dotage dotardism eld elderliness feebleness green old age hale old age hoary age infirm old age infirmity infirmity of age longevity old age oldness pensionable age ricketiness ripe old age second childhood senectitude senile debility senile dementia senile psychosis senile weakness senilism senility senior citizenship superannuation the downward slope the golden years vale of years white hairs