h-hour ho-hum hohoho hohums hommos hommus hoohoo hooroo hororo horror hossur houmus housos hrrors huh-uh humhum hummum hummus humors humour humous hurroo hurumu hushom mhorrs mm-hmm mohoro mohuhu mommur moomoo mooshu mormor mormos mormur moroso moross morous morros morsum mososo mossoo mouros mourou mousum muhuhu muhurr muhuru murmur mushom musmus mussum muumuu ohhush ohohoh oohooh oooooo oromoo orrho- orrour osmous osommo ossous ououso ousrou rhosus romoos romour roshor rossum ruhroh rumohr rumors rumour russo- russus rusumo shmoos shoosh shroom shshsh shursh smohor smoosh sohmor sohouo soomro soosoo sorors sorous sorrus sorsor sorsum sourou sousou summum sumoom sumoor sumuru suroso sursum surumu susumu susurr uh-huh uhhuhs um-hum