noun (n)

• an asset of special worth or utility(noun.attribute)

  Synonym:
  forte, long suit, speciality, specialty, strength, strong point, strong suit
  Antonym:
  weak point
  

  source: wordnet30
• an occupation for which you are especially well suited(noun.act)

  Example:
  In law he found his true metier.
  

  Synonym:
  medium
  

  source: wordnet30