risped irsped rsiped sriped isrped sirped ripsed irpsed rpised prised iprsed pirsed rspied srpied rpsied prsied spried psried ispred sipred ipsred pisred spired psired risepd irsepd rsiepd sriepd isrepd sirepd riespd irespd reispd erispd ierspd eirspd rseipd sreipd resipd ersipd seripd esripd iserpd sierpd iesrpd eisrpd seirpd esirpd ripesd irpesd rpiesd priesd ipresd piresd riepsd irepsd reipsd eripsd ierpsd eirpsd rpeisd preisd repisd erpisd perisd eprisd ipersd piersd ieprsd eiprsd peirsd epirsd rspeid srpeid rpseid prseid spreid psreid rsepid srepid respid erspid serpid esrpid rpesid presid repsid erpsid persid eprsid sperid pserid seprid esprid pesrid epsrid isperd siperd ipserd piserd spierd psierd iseprd sieprd iesprd eisprd seiprd esiprd ipesrd piesrd iepsrd eipsrd peisrd episrd speird pseird sepird espird pesird epsird rispde irspde rsipde sripde isrpde sirpde ripsde irpsde rpisde prisde iprsde pirsde rspide srpide rpside prside spride psride isprde siprde ipsrde pisrde spirde psirde risdpe irsdpe rsidpe sridpe isrdpe sirdpe ridspe irdspe rdispe drispe idrspe dirspe rsdipe srdipe rdsipe drsipe sdripe dsripe isdrpe sidrpe idsrpe disrpe sdirpe dsirpe ripdse irpdse rpidse pridse iprdse pirdse ridpse irdpse rdipse dripse idrpse dirpse rpdise prdise rdpise drpise pdrise dprise ipdrse pidrse idprse diprse pdirse dpirse rspdie srpdie rpsdie prsdie sprdie psrdie rsdpie srdpie rdspie drspie sdrpie dsrpie rpdsie prdsie rdpsie drpsie pdrsie dprsie spdrie psdrie sdprie dsprie pdsrie dpsrie ispdre sipdre ipsdre pisdre spidre psidre isdpre sidpre idspre dispre sdipre dsipre ipdsre pidsre idpsre dipsre pdisre dpisre spdire psdire sdpire dspire pdsire dpsire risedp irsedp rsiedp sriedp isredp siredp riesdp iresdp reisdp erisdp iersdp eirsdp rseidp sreidp residp ersidp seridp esridp iserdp sierdp iesrdp eisrdp seirdp esirdp risdep irsdep rsidep sridep isrdep sirdep ridsep irdsep rdisep drisep idrsep dirsep rsdiep srdiep rdsiep drsiep sdriep dsriep isdrep sidrep idsrep disrep sdirep dsirep riedsp iredsp reidsp eridsp ierdsp eirdsp ridesp irdesp rdiesp driesp idresp diresp redisp erdisp rdeisp dreisp edrisp derisp iedrsp eidrsp idersp diersp edirsp deirsp rsedip sredip resdip ersdip serdip esrdip rsdeip srdeip rdseip drseip sdreip dsreip redsip erdsip rdesip dresip edrsip dersip sedrip esdrip sderip dserip edsrip desrip isedrp siedrp iesdrp eisdrp seidrp esidrp isderp siderp idserp diserp sdierp dsierp iedsrp eidsrp idesrp diesrp edisrp deisrp sedirp esdirp sdeirp dseirp edsirp desirp ripeds irpeds rpieds prieds ipreds pireds riepds irepds reipds eripds ierpds eirpds rpeids preids repids erpids perids eprids iperds pierds ieprds eiprds peirds epirds ripdes irpdes rpides prides iprdes pirdes ridpes irdpes rdipes dripes idrpes dirpes rpdies prdies rdpies drpies pdries dpries ipdres pidres idpres dipres pdires dpires riedps iredps reidps eridps ierdps eirdps rideps irdeps rdieps drieps idreps direps redips erdips rdeips dreips edrips derips iedrps eidrps iderps dierps edirps deirps rpedis predis repdis erpdis perdis eprdis rpdeis prdeis rdpeis drpeis pdreis dpreis redpis erdpis rdepis drepis edrpis derpis pedris epdris pderis dperis edpris depris ipedrs piedrs iepdrs eipdrs peidrs epidrs ipders piders idpers dipers pdiers dpiers iedprs eidprs ideprs dieprs ediprs deiprs pedirs epdirs pdeirs dpeirs edpirs depirs rspedi srpedi rpsedi prsedi spredi psredi rsepdi srepdi respdi erspdi serpdi esrpdi rpesdi presdi repsdi erpsdi persdi eprsdi sperdi pserdi seprdi esprdi pesrdi epsrdi rspdei srpdei rpsdei prsdei sprdei psrdei rsdpei srdpei rdspei drspei sdrpei dsrpei rpdsei prdsei rdpsei drpsei pdrsei dprsei spdrei psdrei sdprei dsprei pdsrei dpsrei rsedpi sredpi resdpi ersdpi serdpi esrdpi rsdepi srdepi rdsepi drsepi sdrepi dsrepi redspi erdspi rdespi drespi edrspi derspi sedrpi esdrpi sderpi dserpi edsrpi desrpi rpedsi predsi repdsi erpdsi perdsi eprdsi rpdesi prdesi rdpesi drpesi pdresi dpresi redpsi erdpsi rdepsi drepsi edrpsi derpsi pedrsi epdrsi pdersi dpersi edprsi deprsi spedri psedri sepdri espdri pesdri epsdri spderi psderi sdperi dsperi pdseri dpseri sedpri esdpri sdepri dsepri edspri despri pedsri epdsri pdesri dpesri edpsri depsri ispedr sipedr ipsedr pisedr spiedr psiedr isepdr siepdr iespdr eispdr seipdr esipdr ipesdr piesdr iepsdr eipsdr peisdr episdr speidr pseidr sepidr espidr pesidr epsidr ispder sipder ipsder pisder spider psider isdper sidper idsper disper sdiper dsiper ipdser pidser idpser dipser pdiser dpiser spdier psdier sdpier dspier pdsier dpsier isedpr siedpr iesdpr eisdpr seidpr esidpr isdepr sidepr idsepr disepr sdiepr dsiepr iedspr eidspr idespr diespr edispr deispr sedipr esdipr sdeipr dseipr edsipr desipr ipedsr piedsr iepdsr eipdsr peidsr epidsr ipdesr pidesr idpesr dipesr pdiesr dpiesr iedpsr eidpsr idepsr diepsr edipsr deipsr pedisr epdisr pdeisr dpeisr edpisr depisr spedir psedir sepdir espdir pesdir epsdir spdeir psdeir sdpeir dspeir pdseir dpseir sedpir esdpir sdepir dsepir edspir despir pedsir epdsir pdesir dpesir edpsir depsir
Note: these 'words' (valid or invalid) are all the permutations of the word risped. These words are obtained by scrambling the letters in risped.