-form bdoor bdort bmdfm bo-bo bobr bodd- bodom bodor bodum boffo bombo boomb boomf boord boort booru borbo bordo bormo boro- borod borom boroo borot borou borro borum borut botom botou botro bottu boudu bourd bouto brmmm brobo brodd brodo broft brom- bromo brood broom broto broud brout brrrr brud- bruff brumm btr-d btr-t buddu budur buffo bumbo bumbu buord buroo burro burru burtt burud burut butdo buto- butor butot butou butuo butut d-dot d-rod ddddd ddrmm ddrum do-do dobro dodoo dodro dofor doodo doout dordt dorff dorot dorud dorum dotoo dotto dotum doubt doufu doumb doumu douro drbob drmom drobo droff drom- dromo drood droof droom drott droum drout drumb drumm dtour dubbo duddo dudou dufur dumbo duomo durtu durum fbomb fodor fofum fomor foodb foord ford- fordo form- forro forto forud forum forur fotur fourb fourd fourm fouro frodo fromm frood froom froot froud fruto ftord ftrtt fu-fu fuddu furbo furo- furor furud futom futur fuudo m-dot mboro mburu mmfbm mmmmm mo-do mobor mobot mobro modom modum modur moffo mombo mombu momot mooro mooto morbo mordt mordu morfu mormo moror morou morro morum morut moto- motor motru motto mottu mrmom mroof mrorr mt-td mt-tf mt-tm mt-tr mt-tt mtd-f mtfmt mtoto muddu mumbo mummu murdo murdu murom muror murot murro murru murud murum murut muto- mutum mutuo muuto o-r-b obodo oboro obout obrom obudu oddur odoom odour odttf odudu oduom oduro offof offto ofoto ofour ofrum ombud omoro omoto omout ooooo orbom orbot ordro orfor orm-d ormod ormur orobo orodo oromo orout orrum ortoo oruro orutu otomo ototo otour ottom ottur oubut ouoro outdo outof outro outto rmutt ro-ro robbo robo- robor robot robrt robur rodbo rodor rofor romfo roodu rooft roomu rorbu roto- rotor rotot rotto roubt roumm routt rtrfm rubof rubor ruffo rufo- rumbo rummo rummu rumor ruomu ruutu tbtbt tbutt to-do tobor tobot tobou todor toffo tofor tombo tombu tommo tomo- tomom tomor toord tordu torob torro torto tortu torud toto- totoo totum tourd touro troff troft tromm trood trott troum trout trubu trudo truff truro ttttt tu-mo tubo- tubod tubof tubou tudor tudou tudur tumbo tumbu tummo tumor tumut tuomo tuotu turbo turbt turot turro turtu turut tutor tutto tuuru u-dub ubobo ufofu uforb umbro umour umudu uroob urour urubu urutu utrdb utro- utror utrum uttur uturu ututo uuuuu