U-boat /ūˈbōt or (German) ooˈ/

A German submarine

• underpayment
• underpayments
• underpays
• underpeep
• underpeeped
• underpeeping
• underpeeps
• under penalty of
• underpeopled
• underperform
• underperformance
• underperformed
• underperforming
• underperforms
• underpin
• underpinned
• underpinning
• underpinnings
• underpins
• under plain cover
• underplant
• underplanted
• underplanting
• underplants
• underplay