Nouns

(n)old age, years, age, eld, geezerhooda late time of life“old age is not for sissies”, “he's showing his years”, “age hasn't slowed him down at all”, “a beard white with eld”, “on the brink of geezerhood”
(n)long time, age, yearsa prolonged period of time“we've known each other for ages”, “I haven't been there for years and years”
(n)days, yearsthe time during which someone's life continues“the monarch's last days”, “in his final years”