Adjectives

(s)erstwhile, former, old, onetime, one-time, quondam, sometimebelonging to some prior time“erstwhile friend”, “our former glory”, “the once capital of the state”, “her quondam lover”

Adverbs

(r)sometimeat some indefinite or unstated time“let's get together sometime”, “everything has to end sometime”, “It was to be printed sometime later”