h-hour hnrnpr hohoho honnor honor- honour hoohoo hoopoo hooroo hop-up hopnpp horonu hororo horror huh-uh hunnur hurroo non-no non-op nonono nonoon nonpro noonoo noonor nounou nuh-uh nurpur ohnono ohohoh ohpooh onhuno oohooh oooooo orphon orrho- orrour ouroun phono- phonon phoro- ponnur poopoo pop-up popopo poporo poppop porno- porron poupon poupou pouron pppppp proph- propho propup propur punpun purnor purpur ronnon ronron rounou ruhroh run-on run-up uh-huh unh-uh unhoop unhunh unprop unu-op uponon uponor uppoor upprop uruppu