congener -- (a minor chemical constituent that gives a wine or liquor its distinctive character)
relative, congener, congenator, congeneric -- (an animal or plant that bears a relationship to another (as related by common descent or by membership in the same genus))
congener -- (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")