8 letters · 13 points in Scrabble
noun an especially luminous meteor (sometimes exploding)
noun a highly energetic and indefatigable person
noun a ball of fire (such as the sun or a ball-shaped discharge of lightning)
originThe noun is derived from fire (noun) + ball (noun). The adjective and verb are derived from the noun.
Etymology from Wiktionary, CC BY-SA 3.0