intumesce in WordNet English dictionary

1. move upwards in bubbles, as from the effect of heating; also used metaphorically
   "Gases bubbled up from the earth"; "Marx's ideas have bubbled up in many places in Latin America"
   bubble up  intumesce 
   
2. expand abnormally
   "The bellies of the starving children are swelling"
   swell  swell up  intumesce  tumefy  tumesce