Search Result for "unmercifulness": 
Wordnet 3.0

NOUN (1)

1. inhumaneness evidenced by an unwillingness to be kind or forgiving;
[syn: mercilessness, unmercifulness]



The Collaborative International Dictionary of English v.0.48:

Unmerciful \Un*mer"ci*ful\, a.
   Not merciful; indisposed to mercy or grace; cruel; inhuman;
   merciless; unkind. -- Un*mer"ci*ful*ly, adv. --
   Un*mer"ci*ful*ness, n.
   [1913 Webster]


WordNet (r) 3.0 (2006):

unmercifulness
    n 1: inhumaneness evidenced by an unwillingness to be kind or
         forgiving [syn: mercilessness, unmercifulness] [ant:
         mercifulness, mercy]