The Oxford Thesaurus An A-Z Dictionary of Synonyms - error n.

1) mistake, inaccuracy, fault, flaw, blunder, slip, gaffe; misprint, typographical error, erratum, solecism; Brit literal, Colloq slip-up, goof, clanger, fluff, boo-boo, howler, Brit bloomer, Slang foul-up, boner, Brit boob: I cannot accept a report so full of errors. 2) sin, transgression, trespass, offence, indiscretion, wrongdoing, misconduct, iniquity, evil, wickedness, flagitiousness: He seems to have seen the error of his ways. 3) in error. a wrong, mistaken, incorrect, at fault: She was in error about the date of the conference. b mistakenly, incorrectly, by mistake, erroneously: I caught the earlier train in error.