peculiarity peculiarity /pɪˌkjuːliːˈɛrəti/

noun

1. () A distinguishing trait  ( distinctiveness , speciality [Canadian, British] , specialness , peculiarity , specialty [ N. American] )
   a distinguishing trait
   
2. () An odd or unusual characteristic  ( distinctive feature , distinguishing characteristic , peculiarity )
   an odd or unusual characteristic
   
3. Something unusual -- perhaps worthy of collecting  ( curiosity , oddity , oddment , curio , peculiarity , rarity )
   something unusual -- perhaps worthy of collecting