Synonyms for Out of the question:

• adj.

  •preposterous (adjective)
  • in saner,
  • in-sane,
  • in sane,
  • un-usual,
  • farout,
  • un usual,
  • taking cake,
  • in sanest,
  • in-saner.
  •totally unlikely (adjective)
  • incomprehensible.
  •unattainable (adjective)
  • un attainable,
  • un-attainable.
  •unnegotiable (adjective)
  • un negotiable,
  • un-negotiable.
  •unrealizable (adjective)
  • un realizable,
  • un-realizable.
  •unthinkable (adjective)
  • beyond belief,
  • beyond possibility,
  • extra-ordinary,
  • extra ordinary,
  • un-ordinary,
  • un-common,
  • un ordinary,
  • un likely,
  • un thinkable,
  • un commoner,
  • un-likely,
  • un likeliest,
  • un-likelier,
  • un common,
  • un likelier,
  • un-thinkable,
  • un-commoner,
  • in supportable,
  • in-supportable,
  • un commonest.
  •unusable (adjective)
  • un usable,
  • un-usable.
  •unworkable (adjective)
  • un workable,
  • un-workable.

• n.

  •out of the question (noun)
  • inconceivable,
  • unimaginable.

• Other synonyms:

  •
  • unrealizable.
  •unrealistic
  • impractical.

Antonyms for Out of the question:

• adj.

  • Other antonyms:
    thinkable.