The Collaborative International Dictionary of English v.0.48:
Blamelessness \Blame"less*ness\, n. The quality or state of being blameless; innocence. [1913 Webster]WordNet (r) 3.0 (2006):
blamelessness n 1: a state of innocence [syn: blamelessness, inculpability, inculpableness, guiltlessness]