noun (n)

• a minor chemical constituent that gives a wine or liquor its distinctive character(noun.substance)

  source: wordnet30
• an animal or plant that bears a relationship to another (as related by common descent or by membership in the same genus)(noun.animal)

  Synonym:
  congenator, congeneric, relative
  

  source: wordnet30
• a whole (a thing or person) of the same kind or category as another(noun.tops)

  Example:
  Lard was also used, though its congener, butter, was more frequently employed.
  The American shopkeeper differs from his European congener.
  

  source: wordnet30
• A thing of the same genus, species, or kind; a thing allied in nature, character, or action.(noun)

  source: webster1913