bo-bo bobr bombo bonon bonou bonum boomb boorn booru borbo bormo born- borno bornu boro- borom boron boroo borou borro borum borun bourn brmmm brobo brom- bromo bronn broom broon broun brrrr brumm brunn bruno bruun bubon bumbo bumbu bunun buono burn- buron buroo burro burru burun mboro mburu mmmmm mobor mobro mombo mombu monno mono- monon monor monro moorn mooro morbo mormo moron moror morou morro morum morun mourn mrmom mrorr mumbo mummu mumun munro murom muron muror murro murru murum nbomb nnooo no-no nobob nobuo nommo nomo- nomom non-u nonno noonu norbu norm- noron norro norum norun nu-nu nunon nunun nuoro nurmo nurun o-bon o-r-b oboro obrom omoon omoro omron onmun onoon onorn onour ooooo orbom ormur ornon orobo oromo orono orrum oruro ouoro ourno rmnmn ro-ro robbo robo- robon robor robun robur romon ronno roomu rorbu roumm rubon rubor rumbo rummo rummu rumor runo- runon ruomu ubobo umbro umour unnun unnur unoor unorn unrun unurn uroob urour urubu uuuuu