congener in WordNet English dictionary

1. an animal or plant that bears a relationship to another (as related by common descent or by membership in the same genus)
   relative  congener  congenator  congeneric 
   
2. a whole (a thing or person) of the same kind or category as another
   "lard was also used, though its congener, butter, was more frequently employed"; "the American shopkeeper differs from his European congener"
   congener 
   
3. a minor chemical constituent that gives a wine or liquor its distinctive character
   congener