metamorphose in WordNet English dictionary

1. change completely the nature or appearance of
   "In Kafka's story, a person metamorphoses into a bug"; "The treatment and diet transfigured her into a beautiful young woman"; "Jesus was transfigured after his resurrection"
   metamorphose  transfigure  transmogrify 
   
2. change in outward structure or looks
   "He transformed into a monster"; "The salesman metamorphosed into an ugly beetle"
   transform  transmute  metamorphose