Synonyms for Corona (same or very similar meaning)
WordNet sense 1 (an electrical discharge accompanied by ionization of surrounding atmosphere):
corposant, corona discharge, electric glow, Saint Elmo's fire, Saint Elmo's light, Saint Ulmo's fire, Saint Ulmo's light, St. Elmo's fireWordNet sense 2 (the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse):
aureoleFrom the ODE community, based on WordNetadd/edit