bo-bo bobr bonon bonou bonox boorn booru borbo born- borno bornu boro- boron boroo borou borox borro borun bourn boxun brobo bronn bronx broon broun brrrr brunn bruno bruun bubon bunun buono buoux burn- buron buroo burro burru burun nnooo no-no nobob nobox nobuo non-u nonno noonu norbu noron norro norun noxon nu-nu nunon nunun nuoro nurun o-bon o-r-b oboro onoon onorn onour ooooo ornon orobo orono oroux oruro ouoro ourno ro-ro robbo robo- robon robor robun robur ronno rorbu rubon rubor runo- runon ubobo unbox unnun unnur uno-x unoor unorn unrun unurn uroob urour urubu uuuuu x-box xbxrx xonox xorro xoxox