Search Result for "perfidiousness": 
Wordnet 3.0

NOUN (1)

1. betrayal of a trust;
[syn: perfidy, perfidiousness, treachery]



The Collaborative International Dictionary of English v.0.48:

Perfidiousness \Per*fid"i*ous*ness\, n.
   The quality of being perfidious; perfidy. --Clarendon.
   [1913 Webster]


WordNet (r) 3.0 (2006):

perfidiousness
    n 1: betrayal of a trust [syn: perfidy, perfidiousness,
         treachery]