The phrase "circle of light" describes a circular area of bright illumination. There are several words that can be used as synonyms for this phrase, such as "halo", "nimbus", "aura", "glow", and "radiance". "Halo" is often used in a religious context to describe the aura surrounding the head of a holy figure. "Nimbus" refers to a circular area of light surrounding an object, while "aura" is a more general term for any type of invisible light or energy that surrounds a person or object. "Glow" and "radiance" both describe a bright, luminous quality that emanates from a source of light.