dododo dogdom dogood domdom domrud dordum dorood dororo doudou dourou drdoom dromo- dromod drough drummr dugdug duhour dumdum durdum gd-rom goddod godord gogoro gohord good-o goodoh googoo gooroo gorgor goudou gourou grorud grough grugru guduru gughod gurgum gurugu h-hour ho-hum hoddom hodhur hogoro hohoho hohrod hoodoo hoohoo hooroo horgr hormud hororo horror hudood huh-uh humhum hummum humour huoguo hurdom hurroo hurumu mm-hmm moddom moddum mogoro mogudu mohoro mohuhu mommur moodur moogoo moomoo mordor mordru mormor mormur morodo morogo mouddo mourou mudomo muggur mugumu muguru muhugu muhuhu muhurr muhuru murdur murgod murgud murmur muumuu ohgood ohohoh oohooh oooooo oordoo ordoru ormrod oromoo orrho- orrour rhodo- rhogog romour romrod roogoo rudgur rudrur ruhroh rumdum rumohr rumour uh-huh um-hum urughu