bbgun bo-bo bobov bobr bogno bogon bogor bogu bogur bongo bongu bonon bonou boong boorn booru borbo borgo borgu born- borno bornu boro- boron boroo borou borov borro borun borvo boung bourg bourn brobo brong bronn broon broun brrrr brugg brung brunn bruno bruun bubon bugno bugoo bugun bungo bungu bunun buono burgo burgu burn- buron buroo burov burro burru burun gnugo go-go go-on go-oo gobbo gogon gogro gongo gonnn gonno gono- goobo goong gorgo gorno gorun goung gounn gouv- grgur grogg grong grono groon groun grrrr grubb gubbo gubno gubru gungu gunnr guroo gurov gurro gurun gurur guvno ngong ngoro ngugu nguru nnooo no-go no-no nobob nobuo non-u nonno noonu norbu noron norro norun norvo novo- novog nu-nu nunon nunun nuoro nuovo nurun o-bon o-r-b oboro obrov ognon ogogo ogron ogugu ongon onoon onorn onour ooooo oovoo orgon orgov orgun ornon orobo orono orrgo oruro ouoro ourno ro-ro robbo robo- robon robor robun robur rogno rogov rongo rongu ronno roong rorbu roung rovon rubon rubor rungu runo- runon ubobo ugong ugro- ugrug un-go ungon ungur unnun unnur unoor unorn unrug unrun unurn urgun uroob urour urubu uuuuu uvrou v-bob v-bor vogon vongo vonnu voobu voorn vooru vornu voron vouno vrbno vrbov vroon vungu vuong