b-room bbbbbb bobowo bobrok bobrow bogoro bokkom bokomo bokoro bombom bombur booboo boogum boom-o borbor borkou borkow borkum borogo boroko boromo bororo borowo borrow boubou bougou boukou bourou bowwow brokkr bromo- brubru bububu bugbug buk-gu bukkur bukowo bukuru bumboo burbur burgoo burgor burgum burowo burrow buruku g-book gobbur goboom gogoro gomguk gomoku gomrok googoo gooroo gorgor gorowo gourou grugru gubgub gukkow gummow gumowo gurbru gurgum gurowo gurugu kobogo koboko kobrow kogoro kokoku kokomo kokoro kokubo komkor komoro komuro kookoo korgom korkor kormuk koromo kororo koroum korubo koruru koubou koukou kouoro kourou kowkur krobow krokom krowor krukow kubowo kukowo kukuom kum-bu kumbor kumbuk kumbum kumbur kumkum kurmuk kurogo kuroko kurowo kururu mbombo mbomou mborko mogoro mogowo mokoro mokowo mommur momoko moogoo moomoo mooruk mormor mormur morogo morowo morrow mourou mowrok mubuko muggur mugumu muguru mukugu mukuro mukuru murmur murrow muumuu obourg obrowo okumoo ombro- ookroo oooooo orkowo oromoo orrour robo-g robomb rogowo rokkor rokuko rokuro romour roogoo rowrow rubkow rubro- rubrum rumbur rumour ubombo wobogo woowoo workum worowo worrow wurrow