Synonyms of impossible

impossible

adjective

as in unlikely

incapable of being solved or accomplished

the seemingly impossible problem of world hunger

fitting everything in my backpack seemed an impossible task

Synonyms & Similar Words

• unlikely
• hopeless
• problematical
• problematic
• impractical
• futile
• unattainable
• incredible
• insoluble
• unrealizable
• undoable
• useless
• absurd
• impracticable
• insuperable
• unsolvable
• insolvable
• infeasible
• questionable
• improbable
• unfeasible
• unworkable
• dubious
• inconceivable
• unusable
• unthinkable
• ridiculous
• unbelievable
• fantastical
• implausible
• unimaginable
• doubtful
• debatable
• suspicious
• suspect
• shaky
• disputable
• fishy
• far-fetched
• fantastic
• outlandish
• shady
• preposterous
• doubtable

Antonyms & Near Antonyms

• possible
• feasible
• workable
• achievable
• reasonable
• useful
• attainable
• practical
• soluble
• applicable
• practicable
• functional
• likely
• doable
• probable
• usable
• working
• serviceable
• realizable
• acceptable
• resolvable
• plausible
• useable
• conceivable
• credible
• believable