bort or boart /bört/

1. Diamond fragments or dust
2. A coarse diamond or crystalline form of carbon, used industrially for cutting or as an abrasive

• piper
• Piper
• old-economy
• olden
• oldened
• Old English
• Old English sheepdog
• Old English sheepdogs
• oldening
• oldens
• older
• oldest
• old-established
• old Europe
• olde-worlde
• old face
• oldfangled
• old fart
• old farts
• old-fashioned
• old-fashioned look
• old-fashionedness
• old fellow
• old fogey
• old-fogeyish