ho-hum hohloh hohoho holhol holloo hollop hollum holmul holnon honomu hoohoo hoopoo hop-up hoplo- hoplon hopnpp huh-uh hulloo huluhu humhum hummum hunnum lollop lollum lomlom lonnol looloo loomup lopho- loplop lopmon loulon loulou lunlun mm-hmm moholl moholm mohuhu mollom molopo moomoo moopoo mop-up mophun moulon muhuhu mullum mulmul muumuu nohmul nomnom nomoon non-no non-op nonono nonoon noonoo nopulp nounou nuh-uh null-o ohnono ohohoh ohpooh omolon omulno onhulu onhuno oohooh oooooo ouolon phlppl phono- phonon phunom plonno polpol pomolo pomoun pompom pompon poopoo pop-up popopo poppop populo poupon poupou pppppp pullno pullon pullup pulmo- pumpon pumpup punpun uh-huh um-hum unh-uh unholl unhool unhoop unhull unhunh unloop unlull unu-op uponon