bhoom bhour bo-bo bo-ho boboc bobr bocho bocom bocor bohor bombo bomoh booch booco boomb booru borbo borch bormo boro- borom boroo borou borro borum bouch brmmm brobo broch brohm brom- bromo broom brrrr bruch brumm bucco bucho buchu bucum bucur bumbo bumbu buoch buoho burch burcu buroo burro burru buruc c-cor ccccc choco chomo chomu choom choor chor- choro choum chrom chubb chumb chur- churm churr churu co-bo co-co cocc- cocco cocom cocum cocur cohob cohoo combo comco commo commr comu- cooch coomb corbo corbu corm- cormo coro- corum couch couco coumb courb couru croco cromb cromo croom croum crumb cruor cubo- cubub cumbo cumbu cumm- cumo- cuoco cuomo curch curro h-cho hbomb hcooh hhhhh hhour ho-ho ho-oh hobor hobro hobub hocco hohum homo- hooch horch horom horro horru houch hourc hroch hubur hucch hucho huhuh humbo humor humur hurm hurum huuru mboro mburu mccoo mchum mhorr mmccc mmhmm mmmcc mmmmm mobor mobro mocco mochh mocho mohor mohuc mohur mombo mombu mooch mooro morbo mormo moroc moror morou morro morum mouch mrcub mrmom mrorr mucho muchu muco- mucor mucro mucum mucur mumbo mumcu mummu murch murom muror murrh murro murru murum o-hum o-r-b obhor oboro obrom occur ochro ocr-b oh-oh ohchr ohmmm ohour ohrob ohrum omoro ooooh ooooo orbom ormoc ormur orobo oroch oroco oromo orrum oruch oruro oucho ouoro r-co- rhomb rhumb ro-ro robbo robo- robor robur rocco rocor rocou rohob rohru roomu rorbu rouch roumm rubor ruhub rumbo rummo rummu rumor ruomu ubobo uchuu uh-oh uh-uh uhhoh uhhuh uhuru umbro umhum umour uroob urour urubu urucu uuuuu