swelling 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 increase in volume of certain substances when they are heated (often accompanied by release of water)
   intumescence  intumescency  swelling 
   
3. an abnormal protuberance or localized enlargement
   swelling  puffiness  lump