The Oxford Thesaurus An A-Z Dictionary of Synonyms - effortn.

1) exertion, striving, struggle, strain, labour, pains, energy, toil, application, trouble, travail, work, Colloq elbow-grease: He's gone to a lot of effort to please her. Getting the place cleaned up took a great deal of effort. 2) attempt, endeavour, essay, try, venture, Colloq stab, crack: Her efforts to be pleasant met with a stony response. 3) achievement, accomplishment, creation, feat, deed, attainment, exploit: Last year's fund-raising fair was a superb effort.