b-room bbbbbb bhutto bo-hoo bombom bombur booboo boohoo boom-o borbor boromo bororo boruth bothr- bothum botoro bottom boubou bourou bourth boutob bromo- brotto brubru brutto brutum btooth bububu bumboo bumout burbot burbur burhou burotu burutu butbro buttto buutuo h-bomb h-hour ho-hum hohhot hohoho hoohoo hooroo hororo horror hortor hotbot hotoro hottot hottub houtou htruth hubbub hububb huh-uh huhhot humhot humhub humhum hummum humour hurroo hurth hurumu huthur huthut mbombo mbomou mm-hmm mobutu mohoro mohout mohuhu mommur moomoo morbut mormor mormur moroto morrot mothur motmot motomu motor- motoro motour moturu mourou mrmoto muhuhu muhurr muhuru murmur muroto muthur mutomo muttur mutuum muumuu obturb ohohoh ohotmu ohtomu ohtoto ombro- oohooh oomoto oooooo oromoo orrho- orrour ortho- otmoor ottoor outour outtro rhobtb rhomb- robomb roboto romour roomth roomto rotour rotout rotrou rottum routot rubbot rubout rubro- rubrum rubutu ruhroh rumbur rumohr rumour rurutu rutour t-room thoro- thourt thouth thromb thromm throut thrumb thurbo toboot tohoro tommot tomort tomtom tomtor toohot tootoo tororo toroth tortor tortou tortum totoro totrot touhou tourou toutou toutuo trombo trotro trumbo tumour tumtum tuotuo turbo- turbot turmut turrum turtur tururu tutour tuttut u-boot ubombo uh-huh um-hum umboth umbuth urhobo utouth utroor