Source : Webster's Revised Unabridged Dictionary (1913)

Amicability \Am`i*ca*bil"i*ty\, n.
   The quality of being amicable; friendliness; amicableness.
   --Ash.

Source : WordNet®

amicability
     n 1: a disinclination to quarrel [syn: {amicableness}]
     2: having a disposition characterized by warmth and
        friendliness [syn: {amicableness}]