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unconceivable

see definition of unconceivable
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Synonyms for unconceivable

adj implausible
  • doubtful
  • dubious
  • far out
  • farfetched
  • fishy
  • flimsy
  • for the birds
  • full of holes
  • impossible
  • improbable
  • inconceivable
  • incredible
  • obscure
  • problematic
  • puzzling
  • reachy
  • shaky
  • suspect
  • thin
  • too much
  • unbelievable
  • unconvincing
  • unreasonable
  • unsubstantial
  • weak
  • won't hold water
  • won't wash
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.