1. A drill for penetrating rock
   - borer, rock drill, stone drill

Derived forms: bore bits

Type of: drill

• astronomical
• astronomical telescope
• Astronomical Unit
• astronomical year
• astronomically
• astronomy
• astronomy satellite
• astronomy unit
• astrophysical
• astrophysicist
• astrophysics
• Astrophyton
• Astrophyton muricatum
• Astropogon
• Astropogon stellatus
• AstroTurf
• astucious
• astute
• astutely
• astuteness
• astylar
• Asuncion
• asunder
• Asur
• Asura