1. 
   protuberate
   [v] - cause to bulge out or project 2. [v] - form a rounded prominence
   Found op http://www.webdictionary.co.uk/definition.php?query=protuberate
   
   
2. 
   Protuberate
   Pro·tu'ber·ate intransitive verb [ Latin protuberare ; pro forward + tuber a hump, protuberance. See Tuber .] To swell, or be prominent, beyond the adjacent surface; to bulge out. S. Sharp.
   Found op http://www.encyclo.co.uk/webster/P/182
   
   
3. 
   Protuberate
   • (v. i.) To swell, or be prominent, beyond the adjacent surface; to bulge out.
   Found op http://thinkexist.com/dictionary/meaning/protuberate/
   
   
4. 
   protuberate
   1) Bag 2) Bulge
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/protuberate/1
   
   

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