coeternal /kō-i-tûrˈnəl or kō-ē-/

1. Equally eternal
2. Jointly eternal

• duckbill
• duck-billed
• duck-billed platypus
• duck-billed platypuses
• duckbills
• duck-board
• duck-boards
• duck-coy
• ducked
• duck-egg blue
• ducker
• duckers
• duck-footed
• duck-hawk
• duck-hawks
• duck hook
• duck hooks
• duckier
• duckies
• duckiest
• ducking
• ducking-pond
• ducking-ponds
• duckings
• ducking-stool