U-boat /ūˈbōt or (German) ooˈ/

A German submarine

• phonocardiograms
• phonocardiograph
• phonofiddle
• phonofiddles
• phonog.
• phonogram
• phonograms
• phonograph
• phonographer
• phonographers
• phonographic
• phonographically
• phonographies
• phonographist
• phonographists
• phonographs
• phonography
• phonolite
• phonolites
• phonolitic
• phonological
• phonologies
• phonologist
• phonologists
• phonology