f-hour fluor- fluoro follow follum foofoo foofur foolow foorum forhoo forhow formo- formol forrow foufou foulum four-h fourof fourou frollo fullof furfur furour furrfu furrow h-hour ho-hum hohloh hohoho holhol holloo hollow hollum holmul holoor holour homowo hoohoo hooroo hororo horror horrow howful huh-uh hulloo hullur huluhu humhum hummum humour hurroo hurumu l-form l-hour lloro lohoof lollum loloru lomlom looloo loroum loulou lourlo lowlow lufful lurulu mm-hmm moffom moffou mofolo moholl moholm mohoro mohuhu mollom molour mommur moomoo mormor mormur morolo morowo morrow mourou mrwolf muffro muhuhu muhurr muhuru mullum mullur mulmul mulmur murmur murrow muumuu ohohoh oohooh oooooo orloff orlowo ormolu oromoo orrho- orrour owlful roflol roloff romolo romour romulo rouful rowrow ruhroh rumohr rumour ruurlo u-form uh-huh ulloor um-hum umhofo umurlu urform whuffo wollow wolouf wolowo woohoo woowoo wormul worowo worrow woulff wrr-fm wurrow wwl-fm