1. 
   hollowness
   [n] - the state of being hollow: having an empty space within 2. [n] - the property of having a sunken area
   Found op http://www.webdictionary.co.uk/definition.php?query=hollowness
   
   
2. 
   Hollowness
   Hol'low·ness noun 1. State of being hollow. Bacon. 2. Insincerity; unsoundness; treachery. South.
   Found op http://www.encyclo.co.uk/webster/H/53
   
   
3. 
   hollowness
   noun the property of having a sunken area
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=hollowness
   
   
4. 
   Hollowness
   • (n.) State of being hollow. • (n.) Insincerity; unsoundness; treachery.
   Found op http://thinkexist.com/dictionary/meaning/hollowness/
   
   
5. 
   hollowness
   1) Emptiness
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/hollowness/1
   
   

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