The Collaborative International Dictionary of English v.0.48:
Amicability \Am`i*ca*bil"i*ty\, n. The quality of being amicable; friendliness; amicableness. --Ash. [1913 Webster]WordNet (r) 3.0 (2006):
amicability n 1: a disinclination to quarrel [syn: amicability, amicableness] 2: having a disposition characterized by warmth and friendliness [syn: amicability, amicableness]