silex /sīˈleks/

1. Silica or quartz
2. A heat-resistant and shock-resistant glass formed of fused quartz

• heptathletes
• heptathlon
• heptathlons
• heptatonic
• her
• her.
• Hera
• Heraclean
• Heracleian
• Heracleidan
• Heracleitean
• Heraclid
• Heraclidan
• Heraclitean
• herald
• herald-duck
• heralded
• heraldic
• heraldically
• heralding
• heraldries
• heraldry
• heralds
• Herald's College
• heraldship