Synonyms for Boil (same or very similar meaning)
WordNet sense 1 (a painful sore with a hard core filled with pus):
furuncleWordNet sense 2 (the temperature at which a liquid boils at sea level):
boiling pointWordNet sense 3 (be agitated):
churn, moil, roilWordNet sense 4 (be in an agitated emotional state):
seetheFrom the ODE community, based on WordNetadd/edit