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

Derived forms: bore bits

Type of: drill

• Helianthus maximilianii
• Helianthus petiolaris
• Helianthus tuberosus
• helical
• Helichrysum
• Helichrysum bracteatum
• Helichrysum secundiflorum
• Helicidae
• helicoid
• helicon
• helicopter
• helicopter view
• Helicteres
• Helicteres isora
• helio-
• Heliobacter
• Heliobacter pylori
• heliocentric
• heliocentric parallax
• heliogram
• heliograph
• heliographic
• heliogravure
• heliolatry
• heliometer