Search Result for "untruthfulness": 
Wordnet 3.0

NOUN (1)

1. the quality of being untruthful; 



The Collaborative International Dictionary of English v.0.48:

Untruthful \Un*truth"ful\, a.
   Not truthful; unveracious; contrary to the truth or the fact.
   -- Un*truth"ful*ly, adv. -- Un*truth"ful*ness, n.
   [1913 Webster]


WordNet (r) 3.0 (2006):

untruthfulness
    n 1: the quality of being untruthful [ant: truthfulness]