For a fire:
* Conflagration: A large, destructive fire. "The forest fire quickly turned into a massive conflagration."
* Inferno: A very intense fire. "The building was engulfed in an inferno."
* Flames: The bright light and heat produced by a fire. "The flames danced in the night sky."
* Fire: (General term) "The firefighters extinguished the fire quickly."
* Burning: The process of being consumed by fire. "The building was still burning."
For a strong light or brightness:
* Glare: Intense light that is difficult to look at. "The sun's glare made it hard to see."
* Shine: To emit bright light. "The stars shone brightly in the night sky."
* Glint: A brief, bright flash of light. "I saw a glint of metal in the bushes."
* Sparkle: To shine with small, bright points of light. "The diamonds sparkled in the sunlight."
For speed or intensity:
* Dash: To move quickly. "The runner dashed across the finish line."
* Race: To move very quickly. "The horses raced down the track."
* Raging: Moving with great force or intensity. "The river was raging after the storm."
* Furious: Extremely intense or powerful. "The wind was furious."
Other options:
* Flash: A sudden burst of light or energy. "There was a flash of lightning."
* Roar: A loud, deep sound, often associated with fire. "The flames roared through the building."
* Erupt: To burst out with great force. "The volcano erupted."
To choose the best word, consider the specific situation and the desired effect.