silex /sīˈleks/

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

• betterness
• betternesses
• better off
• better oneself
• betters
• better than a poke in the eye
• better than a poke in the eye with a sharp stick
• betties
• betting
• bettings
• betting shop
• betting shops
• bettong
• bettongs
• bettor
• bettors
• betty
• blow-off
• blow on
• blow one's brains out
• blow one's mind
• blow one's own trumpet
• blow one's stack
• blow one's top
• blow out