unsped nusped usnped sunped nsuped snuped unpsed nupsed upnsed punsed npused pnused uspned supned upsned pusned spuned psuned nspued snpued npsued pnsued spnued psnued unsepd nusepd usnepd sunepd nsuepd snuepd unespd nuespd uenspd eunspd neuspd enuspd usenpd suenpd uesnpd eusnpd seunpd esunpd nseupd sneupd nesupd ensupd senupd esnupd unpesd nupesd upnesd punesd npuesd pnuesd unepsd nuepsd uenpsd eunpsd neupsd enupsd upensd puensd uepnsd eupnsd peunsd epunsd npeusd pneusd nepusd enpusd penusd epnusd uspend supend upsend pusend spuend psuend usepnd suepnd uespnd euspnd seupnd esupnd upesnd puesnd uepsnd eupsnd peusnd epusnd speund pseund sepund espund pesund epsund nspeud snpeud npseud pnseud spneud psneud nsepud snepud nespud enspud senpud esnpud npesud pnesud nepsud enpsud pensud epnsud spenud psenud sepnud espnud pesnud epsnud unspde nuspde usnpde sunpde nsupde snupde unpsde nupsde upnsde punsde npusde pnusde uspnde supnde upsnde pusnde spunde psunde nspude snpude npsude pnsude spnude psnude unsdpe nusdpe usndpe sundpe nsudpe snudpe undspe nudspe udnspe dunspe nduspe dnuspe usdnpe sudnpe udsnpe dusnpe sdunpe dsunpe nsdupe sndupe ndsupe dnsupe sdnupe dsnupe unpdse nupdse upndse pundse npudse pnudse undpse nudpse udnpse dunpse ndupse dnupse updnse pudnse udpnse dupnse pdunse dpunse npduse pnduse ndpuse dnpuse pdnuse dpnuse uspdne supdne upsdne pusdne spudne psudne usdpne sudpne udspne duspne sdupne dsupne updsne pudsne udpsne dupsne pdusne dpusne spdune psdune sdpune dspune pdsune dpsune nspdue snpdue npsdue pnsdue spndue psndue nsdpue sndpue ndspue dnspue sdnpue dsnpue npdsue pndsue ndpsue dnpsue pdnsue dpnsue spdnue psdnue sdpnue dspnue pdsnue dpsnue unsedp nusedp usnedp sunedp nsuedp snuedp unesdp nuesdp uensdp eunsdp neusdp enusdp usendp suendp uesndp eusndp seundp esundp nseudp sneudp nesudp ensudp senudp esnudp unsdep nusdep usndep sundep nsudep snudep undsep nudsep udnsep dunsep ndusep dnusep usdnep sudnep udsnep dusnep sdunep dsunep nsduep snduep ndsuep dnsuep sdnuep dsnuep unedsp nuedsp uendsp eundsp neudsp enudsp undesp nudesp udnesp dunesp nduesp dnuesp uednsp eudnsp udensp duensp edunsp deunsp nedusp endusp ndeusp dneusp ednusp denusp usednp suednp uesdnp eusdnp seudnp esudnp usdenp sudenp udsenp dusenp sduenp dsuenp uedsnp eudsnp udesnp duesnp edusnp deusnp sedunp esdunp sdeunp dseunp edsunp desunp nsedup snedup nesdup ensdup sendup esndup nsdeup sndeup ndseup dnseup sdneup dsneup nedsup endsup ndesup dnesup ednsup densup sednup esdnup sdenup dsenup edsnup desnup unpeds nupeds upneds puneds npueds pnueds unepds nuepds uenpds eunpds neupds enupds upends puends uepnds eupnds peunds epunds npeuds pneuds nepuds enpuds penuds epnuds unpdes nupdes upndes pundes npudes pnudes undpes nudpes udnpes dunpes ndupes dnupes updnes pudnes udpnes dupnes pdunes dpunes npdues pndues ndpues dnpues pdnues dpnues unedps nuedps uendps eundps neudps enudps undeps nudeps udneps duneps ndueps dnueps uednps eudnps udenps duenps edunps deunps nedups endups ndeups dneups ednups denups upedns puedns uepdns eupdns peudns epudns updens pudens udpens dupens pduens dpuens uedpns eudpns udepns duepns edupns deupns peduns epduns pdeuns dpeuns edpuns depuns npedus pnedus nepdus enpdus pendus epndus npdeus pndeus ndpeus dnpeus pdneus dpneus nedpus endpus ndepus dnepus ednpus denpus pednus epdnus pdenus dpenus edpnus depnus uspedn supedn upsedn pusedn spuedn psuedn usepdn suepdn uespdn euspdn seupdn esupdn upesdn puesdn uepsdn eupsdn peusdn epusdn speudn pseudn sepudn espudn pesudn epsudn uspden supden upsden pusden spuden psuden usdpen sudpen udspen duspen sdupen dsupen updsen pudsen udpsen dupsen pdusen dpusen spduen psduen sdpuen dspuen pdsuen dpsuen usedpn suedpn uesdpn eusdpn seudpn esudpn usdepn sudepn udsepn dusepn sduepn dsuepn uedspn eudspn udespn duespn eduspn deuspn sedupn esdupn sdeupn dseupn edsupn desupn upedsn puedsn uepdsn eupdsn peudsn epudsn updesn pudesn udpesn dupesn pduesn dpuesn uedpsn eudpsn udepsn duepsn edupsn deupsn pedusn epdusn pdeusn dpeusn edpusn depusn spedun psedun sepdun espdun pesdun epsdun spdeun psdeun sdpeun dspeun pdseun dpseun sedpun esdpun sdepun dsepun edspun despun pedsun epdsun pdesun dpesun edpsun depsun nspedu snpedu npsedu pnsedu spnedu psnedu nsepdu snepdu nespdu enspdu senpdu esnpdu npesdu pnesdu nepsdu enpsdu pensdu epnsdu spendu psendu sepndu espndu pesndu epsndu nspdeu snpdeu npsdeu pnsdeu spndeu psndeu nsdpeu sndpeu ndspeu dnspeu sdnpeu dsnpeu npdseu pndseu ndpseu dnpseu pdnseu dpnseu spdneu psdneu sdpneu dspneu pdsneu dpsneu nsedpu snedpu nesdpu ensdpu sendpu esndpu nsdepu sndepu ndsepu dnsepu sdnepu dsnepu nedspu endspu ndespu dnespu ednspu denspu sednpu esdnpu sdenpu dsenpu edsnpu desnpu npedsu pnedsu nepdsu enpdsu pendsu epndsu npdesu pndesu ndpesu dnpesu pdnesu dpnesu nedpsu endpsu ndepsu dnepsu ednpsu denpsu pednsu epdnsu pdensu dpensu edpnsu depnsu spednu psednu sepdnu espdnu pesdnu epsdnu spdenu psdenu sdpenu dspenu pdsenu dpsenu sedpnu esdpnu sdepnu dsepnu edspnu despnu pedsnu epdsnu pdesnu dpesnu edpsnu depsnu
Note: these 'words' (valid or invalid) are all the permutations of the word unsped. These words are obtained by scrambling the letters in unsped.