'labor in vain' definitions:

Synonyms of 'labor in vain'

From: Moby Thesaurus
  • be found wanting,
  • be unsuccessful,
  • beat the air,
  • bootless errand,
  • come to grief,
  • fail,
  • fail of success,
  • flunk,
  • flunk out,
  • go bankrupt,
  • labor of Sisyphus,
  • lash the waves,
  • lose,
  • lost,
  • milk the ram,
  • not come off,
  • not pass,
  • not work,
  • snipe hunt,
  • sow the sand,
  • tilt at windmills,
  • waste of breath,
  • waste of labor,
  • waste of time,
  • wild-goose chase,
  • work of Penelope