Synonyms for For keeps:

• adj.

  •permanent (adjective)
  • diurnal,
  • unfading,
  • imperishable,
  • in for the long haul,
  • forever and a day,
  • perduring,
  • set in stone,
  • in for long haul,
  • set in concrete,
  • indestructible.

• adv

  •ever (adverb)
  • relentlessly,
  • in any case,
  • at all times,
  • at any point,
  • on any occasion,
  • by any chance,
  • unendingly,
  • at all.

• adv.

  •all (adverb)
  • for keeps.
  •always (adverb)
  • in variably,
  • till blue the face,
  • till blue face,
  • till blue in face,
  • in-variably.
  •ever (adverb)
  • ever,
  • to the end of time,
  • endlessly.
  •forever (adverb)
  • till hell freezes over.

• Other synonyms:

  •Other relevant words:
  • evermore,
  • for all time,
  • ceaselessly,
  • ever and again,
  • perpetually,
  • till doomsday,
  • Aye,
  • for ever,
  • ever and anon,
  • eternity.