The Collaborative International Dictionary of English v.0.48:

Kinshasa \Kinshasa\ prop. n.
   the capital city of Zaire, formerly named Leopoldville.

   Syn: Leopoldville.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Leopoldville
    n 1: the capital of the Democratic Republic of the Congo on the
         Congo river opposite Brazzaville [syn: Kinshasa,
         Leopoldville]