Source : Webster's Revised Unabridged Dictionary (1913)

Congeniality \Con*ge`ni*al"i*ty\ (? or ?; 106), n.
   The state or quality of being congenial; natural affinity;
   adaptation; suitableness. --Sir J. Reynolds.

         If congeniality of tastes could have made a marriage
         happy, that union should have been thrice blessed.
                                                  --Motley.

Source : WordNet®

congeniality
     n 1: compatibility between persons [syn: {congenialness}]
     2: a congenial disposition [ant: {uncongeniality}]