f-prot foofoo foofur forfun forout forrot forton fortun fotron foufou fourof fourou fourto frount fruupp ftroop funoon funrun funton furfur furour furrfu furuno futton futuro n-toon noforn non-no non-op nonono nonoon nonpro noonoo noonor noonto noroff noroof norton notfor notour notout notron notton nottoo noturn nounou ntuntu nunton nupont nurpur nurton of-run offput offton offutt ofpoor oftfor on-off onfoot ontour onupto oofotr oooooo oporto optfor optoro optout oroton orrour ottoor ouroun ourton outfor outofp outour output outrun outrup outtop outtro ponnur ponton pontru poofup poopoo pop-up popfor popoff popopo poporo popout poppop poptop porno- porron portof porton potron potton pottop poupon poupou pouron pppppp profor profur pronto propup propur proto- proton prutot puffon puffun puffup punpun pupput pupton purnor purpur purton put-on put-up putoff putour putout putput puttoo puttur ronnon ronron rootof rooton rootup rotour rotout rotrou rotton rounou routot run-on run-up runfor runoff runout runton ruptor rurutu rutour to-fro to-on to-put toforn ton-up tonono tonoro tonour tonpon tonton tootoo top-up topoff toporu topout toppop topton torfou tornup tororo torpor tortor tortou tot-up totnor totopo totoro totrot tou-fu touron tourou touton toutou toutuo tronto tropo- troppo trotro truont tuffon tufton tuotuo tupton turnof turnon turnor turnto turnup turron turton turtur tururu tutour tutton tuttut u-turn unfoot unprop unpuff unroof unroot untorn unturf unturn unu-op up-put uponon uponor uppoor upprop uproot uptono uptorn upturn urturn uruppu utnoor utroor