nural nurar nurla nurlu nurmo nuroa nurra nurun o-bon o-lan o-r-b oaror obaba obala obama obara oblon obnam obolo obora oboro obrab obrom olala olamb olana olanu olaru ollam ollon ollur olman olomu olona olour olumu omala omalo omama omana omara omarr ombla ombra omman omoon omoro omran omron omulu omuma omura onall onano onaol onaon onara onman onmun onoba onoma onoon onora onorn onour onran onuma ooman oomba ooola ooooo oraal oraba oralb orama oramo orana oraon orara orbal orban orbom orlan orlon orman ormur ornan ornon ornua orobo orolu oromo orona orono oroua orrum oruro ouara oullo oulon oulun ouona ouoro oural ouran ourba ourno ourol ra-ra raaba raaor rabab rabal raban rabba rabon rabor rabou rabul rabun ralla rallo ralon ramal raman ramar ramba rambo ramla ramma rammu ramna ramol ramon ramor ramul ranal ranam ranau ranlo ranma ranna ranno rannu ranon ranua ranum raoul raron rauma rauna rauno rauon rmnmn ro-ro roall roana roann robab robar robbo robo- robon robor robun robur rolao rolla rollo rolmo rolon rolua romal roman romao romon ronal ronan ronno rooba rooma roomu roral roram rorbu rorra rouba roull rouma roumm roura ruala ruana ruano rubab ruban rubba rubon rubor rubra rulan rullo rulon rumal ruman rumba rumbo rummo rummu rumor runan runo- runon ruomu rural ruran u-man uaroo ubobo ulaan ulala ulalu ulama ulano ulbra ullal ullam ullar ulloa ullur ulman ulnar ulno- ulrum ulula ululu uluru umala umana umaru umbar umblu umbra umbro umman umour umran unama unamo unara unarm unaru unban unbar unman unmol unnam unnao unnau unnun unnur unona unoor unorn unrar unrol unrra unrun unurn uolba uraan uraba uralo uran- urana urano urban urbar urlam urlar urman urnal urola uroob urour urram urrao uruan urubu uruma uumaa uuuuu