Synonyms and Antonyms of insuperable
- the building project ran into insuperable financial difficulties and had to be scrapped
exposed, imperiled (or imperilled), insecure, liable, open, susceptible, unguarded, unprotected, unsafe
- insuperable problems have arisen which make it very unlikely that we will ever finish this project
impracticable, impractical, infeasible, unusable, unworkable
debatable, disputable, doubtable, doubtful, dubious, far-fetched, fishy, improbable, problematic (also problematical), questionable, shady, shaky, suspect, suspicious, unfeasible, unlikely
implausible, inconceivable, incredible, unbelievable, unimaginable, unthinkable
absurd, fantastic (also fantastical), outlandish, preposterous, ridiculous