dhumku dododo dok-do dokkum dokuro domdom domoko domrud dordum dorood dororo doudou dourou drdoom drhook dromo- dromod drudkh drummr duhour dumdum durdum h-hour ho-hum hoddom hodhur hohoho hohrod hoodoo hoohoo hookor hookum hooroo hormud hororo horror hudood huh-uh hukkok humhum hummum humour hurdom hurroo hurumu khoroo khoruk khorum khuhro kodkod kodoku kodomo koduru kohoku kokkoh kokoku kokomo kokoro komkor komodo komoro komuro koodoo kookoo korkor kormuk koromo kororo koroum koruru koudou koudum koukou kouoro kourou krokom kuduro kuduru kuhrud kukudh kukuom kukurd kumkum kummuh kumukh kurmuk kuroko kurukh kururu mm-hmm moddom moddum mohoro mohuhu mokoro mommur momoko moodur moomoo mooruk mordor mordru mormor mormur morodo mouddo mourou mudomo muhuhu muhurr muhuru mukuro mukuru murdur murmur muumuu o-hook ohohoh okumoo oohooh ookroo oooooo oordoo ordoru ormrod oromoo orrho- orrour rhodo- rokkor rokuko rokuro romour romrod rudrur ruhroh rumdum rumohr rumour udukku uh-huh um-hum