sweirs wseirs sewirs eswirs wesirs ewsirs swiers wsiers siwers iswers wisers iwsers seiwrs esiwrs siewrs isewrs eiswrs ieswrs weisrs ewisrs wiesrs iwesrs eiwsrs iewsrs sweris wseris sewris eswris wesris ewsris swreis wsreis srweis rsweis wrseis rwseis serwis esrwis srewis rsewis erswis reswis wersis ewrsis wresis rwesis erwsis rewsis swires wsires siwres iswres wisres iwsres swries wsries srwies rswies wrsies rwsies sirwes isrwes sriwes rsiwes irswes riswes wirses iwrses wrises rwises irwses riwses seirws esirws sierws iserws eisrws iesrws seriws esriws sreiws rseiws ersiws resiws sirews isrews sriews rsiews irsews risews eirsws iersws erisws reisws iresws riesws weirss ewirss wierss iwerss eiwrss iewrss weriss ewriss wreiss rweiss erwiss rewiss wiress iwress wriess rwiess irwess riwess eirwss ierwss eriwss reiwss irewss riewss sweisr wseisr sewisr eswisr wesisr ewsisr swiesr wsiesr siwesr iswesr wisesr iwsesr seiwsr esiwsr siewsr isewsr eiswsr ieswsr weissr ewissr wiessr iwessr eiwssr iewssr swesir wsesir sewsir eswsir wessir ewssir swseir wsseir ssweir ssweir wsseir swseir seswir esswir ssewir ssewir esswir seswir wessir ewssir wsesir swesir eswsir sewsir swiser wsiser siwser iswser wisser iwsser swsier wssier sswier sswier wssier swsier siswer isswer ssiwer ssiwer isswer siswer wisser iwsser wsiser swiser iswser siwser seiswr esiswr sieswr iseswr eisswr iesswr sesiwr essiwr sseiwr sseiwr essiwr sesiwr sisewr issewr ssiewr ssiewr issewr sisewr eisswr iesswr esiswr seiswr iseswr sieswr weissr ewissr wiessr iwessr eiwssr iewssr wesisr ewsisr wseisr sweisr eswisr sewisr wisesr iwsesr wsiesr swiesr iswesr siwesr eiswsr ieswsr esiwsr seiwsr isewsr siewsr swersi wsersi sewrsi eswrsi wesrsi ewsrsi swresi wsresi srwesi rswesi wrsesi rwsesi serwsi esrwsi srewsi rsewsi erswsi reswsi werssi ewrssi wressi rwessi erwssi rewssi swesri wsesri sewsri eswsri wessri ewssri swseri wsseri ssweri ssweri wsseri swseri seswri esswri ssewri ssewri esswri seswri wessri ewssri wsesri swesri eswsri sewsri swrsei wsrsei srwsei rswsei wrssei rwssei swsrei wssrei sswrei sswrei wssrei swsrei srswei rsswei ssrwei ssrwei rsswei srswei wrssei rwssei wsrsei swrsei rswsei srwsei serswi esrswi sreswi rseswi ersswi resswi sesrwi essrwi sserwi sserwi essrwi sesrwi srsewi rssewi ssrewi ssrewi rssewi srsewi ersswi resswi esrswi serswi rseswi sreswi werssi ewrssi wressi rwessi erwssi rewssi wesrsi ewsrsi wsersi swersi eswrsi sewrsi wrsesi rwsesi wsresi swresi rswesi srwesi erswsi reswsi esrwsi serwsi rsewsi srewsi swirse wsirse siwrse iswrse wisrse iwsrse swrise wsrise srwise rswise wrsise rwsise sirwse isrwse sriwse rsiwse irswse riswse wirsse iwrsse wrisse rwisse irwsse riwsse swisre wsisre siwsre iswsre wissre iwssre swsire wssire sswire sswire wssire swsire siswre isswre ssiwre ssiwre isswre siswre wissre iwssre wsisre swisre iswsre siwsre swrsie wsrsie srwsie rswsie wrssie rwssie swsrie wssrie sswrie sswrie wssrie swsrie srswie rsswie ssrwie ssrwie rsswie srswie wrssie rwssie wsrsie swrsie rswsie srwsie sirswe isrswe sriswe rsiswe irsswe risswe sisrwe issrwe ssirwe ssirwe issrwe sisrwe srsiwe rssiwe ssriwe ssriwe rssiwe srsiwe irsswe risswe isrswe sirswe rsiswe sriswe wirsse iwrsse wrisse rwisse irwsse riwsse wisrse iwsrse wsirse swirse iswrse siwrse wrsise rwsise wsrise swrise rswise srwise irswse riswse isrwse sirwse rsiwse sriwse seirsw esirsw siersw isersw eisrsw iesrsw serisw esrisw sreisw rseisw ersisw resisw siresw isresw sriesw rsiesw irsesw risesw eirssw ierssw erissw reissw iressw riessw seisrw esisrw siesrw isesrw eissrw iessrw sesirw essirw sseirw sseirw essirw sesirw siserw isserw ssierw ssierw isserw siserw eissrw iessrw esisrw seisrw isesrw siesrw sersiw esrsiw sresiw rsesiw erssiw ressiw sesriw essriw sseriw sseriw essriw sesriw srseiw rsseiw ssreiw ssreiw rsseiw srseiw erssiw ressiw esrsiw sersiw rsesiw sresiw sirsew isrsew srisew rsisew irssew rissew sisrew issrew ssirew ssirew issrew sisrew srsiew rssiew ssriew ssriew rssiew srsiew irssew rissew isrsew sirsew rsisew srisew eirssw ierssw erissw reissw iressw riessw eisrsw iesrsw esirsw seirsw isersw siersw ersisw resisw esrisw serisw rseisw sreisw irsesw risesw isresw siresw rsiesw sriesw weirss ewirss wierss iwerss eiwrss iewrss weriss ewriss wreiss rweiss erwiss rewiss wiress iwress wriess rwiess irwess riwess eirwss ierwss eriwss reiwss irewss riewss weisrs ewisrs wiesrs iwesrs eiwsrs iewsrs wesirs ewsirs wseirs sweirs eswirs sewirs wisers iwsers wsiers swiers iswers siwers eiswrs ieswrs esiwrs seiwrs isewrs siewrs wersis ewrsis wresis rwesis erwsis rewsis wesris ewsris wseris sweris eswris sewris wrseis rwseis wsreis swreis rsweis srweis erswis reswis esrwis serwis rsewis srewis wirses iwrses wrises rwises irwses riwses wisres iwsres wsires swires iswres siwres wrsies rwsies wsries swries rswies srwies irswes riswes isrwes sirwes rsiwes sriwes eirsws iersws erisws reisws iresws riesws eisrws iesrws esirws seirws iserws sierws ersiws resiws esriws seriws rseiws sreiws irsews risews isrews sirews rsiews sriews
Note: these 'words' (valid or invalid) are all the permutations of the word sweirs. These words are obtained by scrambling the letters in sweirs.