wipers iwpers wpiers pwiers ipwers piwers wieprs iweprs weiprs ewiprs iewprs eiwprs wpeirs pweirs wepirs ewpirs pewirs epwirs ipewrs piewrs iepwrs eipwrs peiwrs epiwrs wipres iwpres wpires pwires ipwres piwres wirpes iwrpes wripes rwipes irwpes riwpes wpries pwries wrpies rwpies prwies rpwies iprwes pirwes irpwes ripwes priwes rpiwes wierps iwerps weirps ewirps iewrps eiwrps wireps iwreps wrieps rwieps irweps riweps werips ewrips wreips rweips erwips rewips ierwps eirwps irewps riewps eriwps reiwps wperis pweris wepris ewpris pewris epwris wpreis pwreis wrpeis rwpeis prweis rpweis werpis ewrpis wrepis rwepis erwpis rewpis perwis eprwis prewis rpewis erpwis repwis iperws pierws ieprws eiprws peirws epirws iprews pirews irpews ripews priews rpiews ierpws eirpws irepws riepws eripws reipws periws epriws preiws rpeiws erpiws repiws wipesr iwpesr wpiesr pwiesr ipwesr piwesr wiepsr iwepsr weipsr ewipsr iewpsr eiwpsr wpeisr pweisr wepisr ewpisr pewisr epwisr ipewsr piewsr iepwsr eipwsr peiwsr epiwsr wipser iwpser wpiser pwiser ipwser piwser wisper iwsper wsiper swiper iswper siwper wpsier pwsier wspier swpier pswier spwier ipswer piswer ispwer sipwer psiwer spiwer wiespr iwespr weispr ewispr iewspr eiwspr wisepr iwsepr wsiepr swiepr iswepr siwepr wesipr ewsipr wseipr sweipr eswipr sewipr ieswpr eiswpr isewpr siewpr esiwpr seiwpr wpesir pwesir wepsir ewpsir pewsir epwsir wpseir pwseir wspeir swpeir psweir spweir wespir ewspir wsepir swepir eswpir sewpir peswir epswir psewir spewir espwir sepwir ipeswr pieswr iepswr eipswr peiswr episwr ipsewr pisewr ispewr sipewr psiewr spiewr iespwr eispwr isepwr siepwr esipwr seipwr pesiwr epsiwr pseiwr speiwr espiwr sepiwr wiprse iwprse wpirse pwirse ipwrse piwrse wirpse iwrpse wripse rwipse irwpse riwpse wprise pwrise wrpise rwpise prwise rpwise iprwse pirwse irpwse ripwse priwse rpiwse wipsre iwpsre wpisre pwisre ipwsre piwsre wispre iwspre wsipre swipre iswpre siwpre wpsire pwsire wspire swpire pswire spwire ipswre piswre ispwre sipwre psiwre spiwre wirspe iwrspe wrispe rwispe irwspe riwspe wisrpe iwsrpe wsirpe swirpe iswrpe siwrpe wrsipe rwsipe wsripe swripe rswipe srwipe irswpe riswpe isrwpe sirwpe rsiwpe sriwpe wprsie pwrsie wrpsie rwpsie prwsie rpwsie wpsrie pwsrie wsprie swprie pswrie spwrie wrspie rwspie wsrpie swrpie rswpie srwpie prswie rpswie psrwie sprwie rspwie srpwie iprswe pirswe irpswe ripswe priswe rpiswe ipsrwe pisrwe isprwe siprwe psirwe spirwe irspwe rispwe isrpwe sirpwe rsipwe sripwe prsiwe rpsiwe psriwe spriwe rspiwe srpiwe wiersp iwersp weirsp ewirsp iewrsp eiwrsp wiresp iwresp wriesp rwiesp irwesp riwesp werisp ewrisp wreisp rweisp erwisp rewisp ierwsp eirwsp irewsp riewsp eriwsp reiwsp wiesrp iwesrp weisrp ewisrp iewsrp eiwsrp wiserp iwserp wsierp swierp iswerp siwerp wesirp ewsirp wseirp sweirp eswirp sewirp ieswrp eiswrp isewrp siewrp esiwrp seiwrp wirsep iwrsep wrisep rwisep irwsep riwsep wisrep iwsrep wsirep swirep iswrep siwrep wrsiep rwsiep wsriep swriep rswiep srwiep irswep riswep isrwep sirwep rsiwep sriwep wersip ewrsip wresip rwesip erwsip rewsip wesrip ewsrip wserip swerip eswrip sewrip wrseip rwseip wsreip swreip rsweip srweip erswip reswip esrwip serwip rsewip srewip ierswp eirswp ireswp rieswp eriswp reiswp iesrwp eisrwp iserwp sierwp esirwp seirwp irsewp risewp isrewp sirewp rsiewp sriewp ersiwp resiwp esriwp seriwp rseiwp sreiwp wpersi pwersi weprsi ewprsi pewrsi epwrsi wpresi pwresi wrpesi rwpesi prwesi rpwesi werpsi ewrpsi wrepsi rwepsi erwpsi rewpsi perwsi eprwsi prewsi rpewsi erpwsi repwsi wpesri pwesri wepsri ewpsri pewsri epwsri wpseri pwseri wsperi swperi psweri spweri wespri ewspri wsepri swepri eswpri sewpri peswri epswri psewri spewri espwri sepwri wprsei pwrsei wrpsei rwpsei prwsei rpwsei wpsrei pwsrei wsprei swprei pswrei spwrei wrspei rwspei wsrpei swrpei rswpei srwpei prswei rpswei psrwei sprwei rspwei srpwei werspi ewrspi wrespi rwespi erwspi rewspi wesrpi ewsrpi wserpi swerpi eswrpi sewrpi wrsepi rwsepi wsrepi swrepi rswepi srwepi erswpi reswpi esrwpi serwpi rsewpi srewpi perswi eprswi preswi rpeswi erpswi repswi pesrwi epsrwi pserwi sperwi esprwi seprwi prsewi rpsewi psrewi sprewi rspewi srpewi erspwi respwi esrpwi serpwi rsepwi srepwi ipersw piersw ieprsw eiprsw peirsw epirsw ipresw piresw irpesw ripesw priesw rpiesw ierpsw eirpsw irepsw riepsw eripsw reipsw perisw eprisw preisw rpeisw erpisw repisw ipesrw piesrw iepsrw eipsrw peisrw episrw ipserw piserw isperw siperw psierw spierw iesprw eisprw iseprw sieprw esiprw seiprw pesirw epsirw pseirw speirw espirw sepirw iprsew pirsew irpsew ripsew prisew rpisew ipsrew pisrew isprew siprew psirew spirew irspew rispew isrpew sirpew rsipew sripew prsiew rpsiew psriew spriew rspiew srpiew ierspw eirspw irespw riespw erispw reispw iesrpw eisrpw iserpw sierpw esirpw seirpw irsepw risepw isrepw sirepw rsiepw sriepw ersipw resipw esripw seripw rseipw sreipw persiw eprsiw presiw rpesiw erpsiw repsiw pesriw epsriw pseriw speriw espriw sepriw prseiw rpseiw psreiw spreiw rspeiw srpeiw erspiw respiw esrpiw serpiw rsepiw srepiw
Note: these 'words' (valid or invalid) are all the permutations of the word wipers. These words are obtained by scrambling the letters in wipers.