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

1) vow, avowal, pledge, promise, word (of honour) , promise, plight, guarantee or guaranty, warrant or warranty, (sworn) statement, Archaic troth: She has taken an oath to tell the whole truth. 2) curse, profanity, blasphemous language or expression or word, imprecation, malediction, swear-word, expletive, four-letter word, obscenity, dirty word: The door slammed on his finger and he muttered a foul oath.