1. An especially luminous meteor (sometimes exploding)
   - bolide 
2. A highly energetic and indefatigable person
   - powerhouse, human dynamo, ball of fire 
3. A ball of fire (such as the sun or a ball-shaped discharge of lightning) 
4. The luminous centre of a nuclear explosion

Derived forms: fireballs

Type of: actor, ball, doer, falling star, globe, meteor, orb, shooting star, worker

Part of: atomic explosion, nuclear explosion

Encyclopedia: Fireball

• groundberry
• groundbreaker
• groundbreaking
• groundbreaking ceremony
• groundcover
• grounder
• groundfish
• groundhog
• Groundhog Day
• grounding
• groundkeeper
• groundless
• groundlessly
• groundlessness
• groundling
• groundmass
• groundnut
• groundnut oil
• groundnut vine
• grounds
• groundsel
• groundsel bush
• groundsel tree
• groundsheet
• groundskeeper