The Collaborative International Dictionary of English v.0.48:
Likeliness \Like"li*ness\, n. 1. Likelihood; probability. [1913 Webster] 2. Suitableness; agreeableness. [Obs.] [1913 Webster]WordNet (r) 3.0 (2006):
likeliness n 1: the probability of a specified outcome [syn: likelihood, likeliness] [ant: unlikelihood, unlikeliness]