St. Elmo's Fire is a weather phenomenon that is often seen during thunderstorms. It is a blue or violet glow that appears along the tops of tall objects like trees, masts, and buildings. This mysterious and beautiful sight has inspired many names and synonyms, each describing its appearance and meaning. Some of the most common synonyms for St. Elmo's Fire are corposant, fireball, ghostly flame, and Saint Elmo's light. Other less known synonyms are climbing light, firework spark, and sea fire. Regardless of what it is called, St. Elmo's Fire is a fascinating natural occurrence that continues to capture our imagination and wonder.