1. 
   noiselessness
   [n] - the property of making no noise
   Found op http://www.webdictionary.co.uk/definition.php?query=noiselessness
   
   
2. 
   noiselessness
   noun the property of making no noise
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=noiselessness
   
   
3. 
   noiselessness
   1) Quietness 2) Soundlessness 3) The property of making no noise
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/noiselessness/1
   
   

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