Source : Webster's Revised Unabridged Dictionary (1913)

Associability \As*so`cia*bil"i*ty\, n.
   The quality of being associable, or capable of association;
   associableness. ``The associability of feelings.'' --H.
   Spencer.

Source : WordNet®

associability
     n : the capability of being easily associated or joined or
         connected in thought [syn: {associableness}]