bhoom bhoot bhour bo-bo bo-ho bobr bohor bohot bombo bomoh boomb boort booru booth borbo bormo boro- borom boroo borot borou borro borth borum borut botom botou botro bottu bouth bouto brmmm brobo brohm brom- bromo broom broth broto brout brrrr brumm btr-t bumbo bumbu buoho buroo burro burru burtt burut buto- butoh butor butot butou butuo butut hbomb hhhhh hhour ho-ho ho-oh hobor hobro hobub hohot hohum homo- hoort horom horro horru horth horto hothr hotot hotto houtu hthrt htuom hubur huhuh humbo humor humur hurm hurtt hurtu hurum hutor hutto huttu huuru mboro mburu mhorr mmhmm mmmmm mobor mobot mobro mohor mohur mombo mombu momot mooro mooth mooto morbo mormo moror morou morro morth morum morut motho moto- motor motru motto mottu mouht mouth mrmom mrorr mt-th mt-tm mt-tr mt-tt mtoto mumbo mummu murom muror murot murrh murro murru murth murum murut muthu muto- mutum mutuo muuto o-hum o-r-b obhor oboro oboth obout obrom oh-oh ohbot ohmmm ohour ohrob ohrot ohrum omoro omoto omout ooooh ooooo orbom orbot ormur orobo oromo orout orrum orth- ortho ortoo oruro orutu othom othou othur otomo ototo otour ottom ottur oubut ouoro outro outto rhomb rhumb rmutt ro-ro robbo robo- robor robot robrt robur rohob rohru romth roomu rorbu rotho roto- rotor rotot rotto roubt roumm routh routt rubor ruhub rumbo rummo rummu rumor ruomu ruthu ruuth ruutu t-hub tbtbt tbutt thomb thomm thoom thoro thorr thort thoru thoth thour thout throb throm throo throt throu thrub thrum thumb thurm thurt thuru to-ho tobor tobot tobou tohot tombo tombu tommo tomo- tomom tomor tooth torht torob torro torto tortu toto- totoo totum touho touro tromm troth trott troum trout trubu truro truth ttttt tu-mo tubo- tubou tumbo tumbu tummo tumor tumut tuomo tuotu turbo turbt turot turro turtu turut tutor tutto tuuru ubobo uh-oh uh-uh uhhoh uhhuh uhuru umbro umhum umour uroob urour urubu urutu utro- utror utrum uttur uturu ututo uuuuu