f-prot fhtpnh foofoo foorth forhoo forrot forth- forton fotron ftroop hnrnpr hohhot hohoho honnor honor- honton hoohoo hoopoo hooroo hooton hopnpp hopoff hopton hororo horror horton hortor hotfor hotnot hotoff hotoro hotpot hotton hottot n-toon noforn non-no non-op nonhot nonono nonoon nonpro noonoo noonor noonto noroff noroof norton notfor notho- nothot notron notton nottoo offton ofpoor oftfor ohnono ohohoh ohpooh ohtoto on-off onfoot oofotr oohooh oooooo oporto optfor optoro oroton orphon orrho- ortho- ottoor pforth phffft phono- phonon phoro- photo- photon phthor ponton poopoo popfor popoff popopo poporo poppop poptop porno- porron portof porton potron potton pottop pppppp profor pronto proph- propho proto- proton ronnon ronron rootof rooton rotton thonon thonor thornn thoro- thoron throop to-fro to-on toforn tohoro tonono tonoro tonpon tonton toohot tootoo topoff toppop topton tororo toroth torpor tortor totnor totopo totoro totrot tronoh tronto troph- tropo- troppo trotro