bombora /bom-bōˈrə or -böˈrə/ (Aust)

1. A submerged reef
2. A dangerous current or rough sea over such a reef

• firmers
• firmest
• firming
• firmless
• firmly
• firmness
• firmnesses
• firms
• firm up
• firmware
• firmwares
• firn
• firns
• firrier
• firriest
• firring
• firry
• firs
• first
• first aid
• first-aider
• first-aiders
• first and last
• first-attack
• first-begotten