tutun tuubi tuudi tuuei tuuri tuuru u-bit u-dub u-n-i u-nii ubeen ubend uber- ubide ubirr udder udenu udert udine uinen uitti unbed unbet unbid unbit unbud undee unden under undid undie undit undri undub undue undun undur unend unete unibe unini uninn unite uniti unnet unnun unnur unnut unred unrid unrun unted unten unter untie unurn urdee ureid ureit urent uribe uride urien urin- urine urite urned urter urubu uruit ururi uruti urutu utenn uter- uteri utier utrdb utter uttur utube uturn uturu uunet uuuuu