bdoor bo-bo bobr bodd- bodom bodor bodum bombo boomb boord booru borbo bordo bormo boro- borod borom boroo borou borro borum boudu bourd brmmm brobo brodd brodo brom- bromo brood broom broud brrrr brud- brumm buddu budur bumbo bumbu buord buroo burro burru burud d-rod ddddd ddrmm ddrum do-do dobro dodoo dodro doodo dorud dorum doumb doumu douro drbob drmom drobo drom- dromo drood droom droum drumb drumm dubbo duddo dudou dumbo duomo durum mboro mburu mmmmm mo-do mobor mobro modom modum modur mombo mombu mooro morbo mordu mormo moror morou morro morum mrmom mrorr muddu mumbo mummu murdo murdu murom muror murro murru murud murum o-r-b obodo oboro obrom obudu oddur odoom odour odudu oduom oduro ombud omoro ooooo orbom ordro orm-d ormod ormur orobo orodo oromo orrum oruro ouoro ro-ro robbo robo- robor robur rodbo rodor roodu roomu rorbu roumm rubor rumbo rummo rummu rumor ruomu u-dub ubobo umbro umour umudu uroob urour urubu uuuuu