noun (n)

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

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

  source: wordnet30
• a distinguishing trait(noun.attribute)

  Synonym:
  distinctiveness, peculiarity, speciality, specialness
  

  source: wordnet30
• the special line of work you have adopted as your career(noun.act)

  Synonym:
  specialisation, specialism, speciality, specialization
  

  source: wordnet30
• Particularity.(noun)

  source: webster1913