specialness specialness /ˈspɛʃəlnɪs/

noun

1. The quality of being particular and pertaining to a specific case or instance  ( particularity , specialness )
   the quality of being particular and pertaining to a specific case or instance
    The particularity of human situations
   the particularity of human situations
   
2. A distinguishing trait  ( distinctiveness , speciality [Canadian, British] , specialness , peculiarity , specialty [ N. American] )
   a distinguishing trait