Synonyms for In a while:

• adv.

  •afterward/afterwards (adverb)
  • next,
  • ultimately,
  • a while later,
  • soon,
  • thereafter,
  • late,
  • subsequently,
  • after,
  • behind,
  • latterly.
  •later (adverb)
  • succeeding,
  • come sunday,
  • more recent,
  • again.
  •soon (adverb)
  • presently,
  • in due time,
  • directly.
  •ulteriorly (adverb)
  • afterwards.

• Other synonyms:

  •later
  • afterward.
  •Other relevant words:
  • in due course,
  • in a little while,
  • betimes,
  • ANON,
  • before long,
  • ere long,
  • in a short time.

Antonyms for In a while:

• adv.

  • afterward/afterwards
    beforehand.
  • later
    earlier, before.