froise rfoise forise ofrise rofise orfise friose rfiose firose ifrose rifose irfose foirse ofirse fiorse iforse oifrse iofrse roifse orifse riofse irofse oirfse iorfse frosie rfosie forsie ofrsie rofsie orfsie frsoie rfsoie fsroie sfroie rsfoie srfoie fosrie ofsrie fsorie sforie osfrie sofrie rosfie orsfie rsofie srofie osrfie sorfie frisoe rfisoe firsoe ifrsoe rifsoe irfsoe frsioe rfsioe fsrioe sfrioe rsfioe srfioe fisroe ifsroe fsiroe sfiroe isfroe sifroe risfoe irsfoe rsifoe srifoe isrfoe sirfoe foisre ofisre fiosre ifosre oifsre iofsre fosire ofsire fsoire sfoire osfire sofire fisore ifsore fsiore sfiore isfore sifore oisfre iosfre osifre soifre isofre siofre roisfe orisfe riosfe irosfe oirsfe iorsfe rosife orsife rsoife sroife osrife sorife risofe irsofe rsiofe sriofe isrofe sirofe oisrfe iosrfe osirfe soirfe isorfe siorfe froies rfoies fories ofries rofies orfies frioes rfioes firoes ifroes rifoes irfoes foires ofires fiores ifores oifres iofres roifes orifes riofes irofes oirfes iorfes froeis rfoeis foreis ofreis rofeis orfeis freois rfeois ferois efrois refois erfois foeris oferis feoris eforis oefris eofris roefis orefis reofis erofis oerfis eorfis frieos rfieos fireos ifreos rifeos irfeos freios rfeios ferios efrios refios erfios fieros iferos feiros efiros iefros eifros riefos irefos reifos erifos ierfos eirfos foiers ofiers fioers ifoers oifers iofers foeirs ofeirs feoirs efoirs oefirs eofirs fieors ifeors feiors efiors iefors eifors oiefrs ioefrs oeifrs eoifrs ieofrs eiofrs roiefs oriefs rioefs iroefs oirefs iorefs roeifs oreifs reoifs eroifs oerifs eorifs rieofs ireofs reiofs eriofs ierofs eirofs oierfs ioerfs oeirfs eoirfs ieorfs eiorfs frosei rfosei forsei ofrsei rofsei orfsei frsoei rfsoei fsroei sfroei rsfoei srfoei fosrei ofsrei fsorei sforei osfrei sofrei rosfei orsfei rsofei srofei osrfei sorfei froesi rfoesi foresi ofresi rofesi orfesi freosi rfeosi ferosi efrosi refosi erfosi foersi ofersi feorsi eforsi oefrsi eofrsi roefsi orefsi reofsi erofsi oerfsi eorfsi frseoi rfseoi fsreoi sfreoi rsfeoi srfeoi fresoi rfesoi fersoi efrsoi refsoi erfsoi fseroi sferoi fesroi efsroi sefroi esfroi rsefoi srefoi resfoi ersfoi serfoi esrfoi foseri ofseri fsoeri sfoeri osferi soferi foesri ofesri feosri efosri oefsri eofsri fseori sfeori fesori efsori sefori esfori osefri soefri oesfri eosfri seofri esofri rosefi orsefi rsoefi sroefi osrefi sorefi roesfi oresfi reosfi erosfi oersfi eorsfi rseofi sreofi resofi ersofi serofi esrofi oserfi soerfi oesrfi eosrfi seorfi esorfi friseo rfiseo firseo ifrseo rifseo irfseo frsieo rfsieo fsrieo sfrieo rsfieo srfieo fisreo ifsreo fsireo sfireo isfreo sifreo risfeo irsfeo rsifeo srifeo isrfeo sirfeo frieso rfieso fireso ifreso rifeso irfeso freiso rfeiso feriso efriso refiso erfiso fierso iferso feirso efirso iefrso eifrso riefso irefso reifso erifso ierfso eirfso frseio rfseio fsreio sfreio rsfeio srfeio fresio rfesio fersio efrsio refsio erfsio fserio sferio fesrio efsrio sefrio esfrio rsefio srefio resfio ersfio serfio esrfio fisero ifsero fsiero sfiero isfero sifero fiesro ifesro feisro efisro iefsro eifsro fseiro sfeiro fesiro efsiro sefiro esfiro isefro siefro iesfro eisfro seifro esifro risefo irsefo rsiefo sriefo isrefo sirefo riesfo iresfo reisfo erisfo iersfo eirsfo rseifo sreifo resifo ersifo serifo esrifo iserfo sierfo iesrfo eisrfo seirfo esirfo foiser ofiser fioser ifoser oifser iofser fosier ofsier fsoier sfoier osfier sofier fisoer ifsoer fsioer sfioer isfoer sifoer oisfer iosfer osifer soifer isofer siofer foiesr ofiesr fioesr ifoesr oifesr iofesr foeisr ofeisr feoisr efoisr oefisr eofisr fieosr ifeosr feiosr efiosr iefosr eifosr oiefsr ioefsr oeifsr eoifsr ieofsr eiofsr foseir ofseir fsoeir sfoeir osfeir sofeir foesir ofesir feosir efosir oefsir eofsir fseoir sfeoir fesoir efsoir sefoir esfoir osefir soefir oesfir eosfir seofir esofir fiseor ifseor fsieor sfieor isfeor sifeor fiesor ifesor feisor efisor iefsor eifsor fseior sfeior fesior efsior sefior esfior isefor siefor iesfor eisfor seifor esifor oisefr iosefr osiefr soiefr isoefr sioefr oiesfr ioesfr oeisfr eoisfr ieosfr eiosfr oseifr soeifr oesifr eosifr seoifr esoifr iseofr sieofr iesofr eisofr seiofr esiofr roisef orisef riosef irosef oirsef iorsef rosief orsief rsoief sroief osrief sorief risoef irsoef rsioef srioef isroef siroef oisref iosref osiref soiref isoref sioref roiesf oriesf rioesf iroesf oiresf ioresf roeisf oreisf reoisf eroisf oerisf eorisf rieosf ireosf reiosf eriosf ierosf eirosf oiersf ioersf oeirsf eoirsf ieorsf eiorsf roseif orseif rsoeif sroeif osreif soreif roesif oresif reosif erosif oersif eorsif rseoif sreoif resoif ersoif seroif esroif oserif soerif oesrif eosrif seorif esorif riseof irseof rsieof srieof isreof sireof riesof iresof reisof erisof iersof eirsof rseiof sreiof resiof ersiof seriof esriof iserof sierof iesrof eisrof seirof esirof oiserf ioserf osierf soierf isoerf sioerf oiesrf ioesrf oeisrf eoisrf ieosrf eiosrf oseirf soeirf oesirf eosirf seoirf esoirf iseorf sieorf iesorf eisorf seiorf esiorf
Note: these 'words' (valid or invalid) are all the permutations of the word froise. These words are obtained by scrambling the letters in froise.