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

• octuplets
• octuplicate
• octuplicates
• octupling
• ocular
• ocularist
• ocularists
• ocularly
• oculars
• oculate
• oculated
• oculi
• oculist
• oculists
• oculo-
• oculomotor
• oculus
• od
• OD
• oda
• ODA
• odal
• odalique
• odaliques
• odalisk