1. Fiercely: This describes the intensity of the fire. "The flames burned fiercely, consuming the entire building."
2. Rapidly: This describes the speed at which the fire spreads. "The wildfire spread rapidly, fueled by dry brush."
3. Erupting: This describes the sudden and forceful release of fire. "The volcano erupted, spewing fire and ash into the sky."
4. Crackling: This describes the sound of the fire. "The fireplace crackled cheerfully, warming the room."
5. Flickering: This describes the movement of the flames. "The candlelight flickered softly, casting dancing shadows on the wall."
Let me know if you'd like other examples, or if you have a specific context in mind!