pretentiousness in WordNet English dictionary

1. lack of elegance as a consequence of being pompous and puffed up with vanity
   ostentation  ostentatiousness  pomposity  pompousness  pretentiousness  puffiness  splashiness  inflation 
   
2. the quality of being pretentious (behaving or speaking in such a manner as to create a false appearance of great importance or worth)
   pretentiousness  pretension  largeness 
   

pretentiousness in English Wiktionary