labor of Sisyphus Synonyms

Here are words similar to labor of Sisyphus:
abortion, abortive attempt, be found wanting, be unsuccessful, beat the air, bootless errand, come to grief, dud, fail, fail of success, flunk, flunk out, go bankrupt, labor in vain, labor of Sisyphus, lash the waves, lose, lost, merry chase, milk the ram, miscarriage, miscarrying, misfire, not come off, not pass, not work, snipe hunt, sow the sand, tilt at windmills, vain attempt, waste of breath, waste of labor, waste of time, wet squib, wild goose chase, wild-goose chase,

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