Synonyms for St. elmo's fire:

n.

St. Elmo's fire (noun)
Saint Ulmo's Fire, corona discharge, Saint Elmo's Fire, corona, Saint Elmo's Light, Saint Ulmo's Light, corposant, electric glow.

Other synonyms:

Saint Elmo's fire
Saint Elmo's Fire.
Saint Elmo's light
Saint Elmo's Light.
Saint Ulmo's fire
Saint Ulmo's Fire.
Saint Ulmo's light
Saint Ulmo's Light.