The Collaborative International Dictionary of English v.0.48:

Rapprochement \Rap`proche`ment"\, n. [F., fr. rapprocher to
   cause to approach again. See Re-; Approach.]
   Act or fact of coming or being drawn near or together;
   establishment or state of cordial relations.
   [Webster 1913 Suppl.]

         He had witnessed the gradual rapprochement between the
         papacy and Austria.                      --Wilfrid
                                                  Ward.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

rapprochement
    n 1: the reestablishing of cordial relations [syn:
         reconciliation, rapprochement]