noun (n)

• profane or obscene expression usually of surprise or anger(noun.communication)

  Synonym:
  curse, curse word, cuss, expletive, oath, swearword
  

  source: wordnet30
• a commitment to tell the truth (especially in a court of law); to lie under oath is to become subject to prosecution for perjury(noun.communication)

  Synonym:
  oath
  

  source: wordnet30