silex /sīˈleks/

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

• hermits
• hermit thrush
• hermit thrushes
• herms
• hern
• hernia
• herniae
• hernial
• hernias
• herniated
• her nibs
• herniorrhaphies
• herniorrhaphy
• herniotomies
• herniotomy
• hernshaw
• hernshaws
• her number is up
• hero
• Hero
• heroes
• heroic
• heroic age
• heroical
• heroically