hollowness

from WordNet (r) 3.0 (2006)

hollowness
    n 1: the state of being hollow: having an empty space within
         [ant: {solidity}]
    2: the property of having a sunken area
    3: the quality of not being open or truthful; deceitful or
       hypocritical [syn: {insincerity}, {falseness}, {hollowness}]
       [ant: {sincerity}]

from The Collaborative International Dictionary of English v.0.48

Hollowness \Hol"low*ness\, n.
   1. State of being hollow. --Bacon.
      [1913 Webster]

   2. Insincerity; unsoundness; treachery. --South.
      [1913 Webster] holloware