U-boat /ūˈbōt or (German) ooˈ/

A German submarine

• retrenching
• retrenchment
• retrenchments
• retrial
• retrials
• retribute
• retributed
• retributes
• retributing
• retribution
• retributions
• retributive
• retributively
• retributor
• retributors
• retributory
• retried
• retries
• retrievable
• retrievableness
• retrievablenesses
• retrievably
• retrieval
• retrievals
• retrieve