protuberance in WordNet English dictionary

1. something that bulges out or is protuberant or projects from its surroundings
   "the gun in his pocket made an obvious bulge"; "the hump of a camel"; "he stood on the rocky prominence"; "the occipital protuberance was well developed"; "the bony excrescence between its horns"
   bulge  bump  hump  swelling  gibbosity  gibbousness  jut  prominence  protuberance  protrusion  extrusion  excrescence 
   
2. the condition of being protuberant; the condition of bulging out
   "the protuberance of his belly"
   protuberance