Synonyms for Sooner:

adv.

all (adverb)
earlier.
rather (adverb)
rather.

n.

imminent, at the earliest/first opportunity, shortly, around the corner, just, in no time (at all), any day/moment etc. now, in the short run/term, soon, close. sooner (noun)
earlier, rather, preferably.

Other synonyms:

Other relevant words:
soon, shortly.

Usage examples for sooner

  1. But you'd be dead sooner or later. – Philo Gubb Correspondence-School Detective by Ellis Parker Butler
  2. He answered, " I had lost myself in a forest, and could not find my way out again any sooner – Household Tales by Brothers Grimm by Grimm Brothers
  3. He'll know sooner or later where she is. – The Chief Legatee by Anna Katharine Green