cousin ocusin cuosin ucosin oucsin uocsin cosuin ocsuin csouin scouin oscuin socuin cusoin ucsoin csuoin scuoin uscoin sucoin ouscin uoscin osucin soucin usocin suocin couisn ocuisn cuoisn ucoisn oucisn uocisn coiusn ociusn ciousn icousn oicusn iocusn cuiosn uciosn ciuosn icuosn uicosn iucosn ouicsn uoicsn oiucsn ioucsn uiocsn iuocsn cosiun ocsiun csoiun scoiun osciun sociun coisun ocisun ciosun icosun oicsun iocsun csioun scioun cisoun icsoun sicoun iscoun osicun soicun oiscun ioscun siocun isocun cusion ucsion csuion scuion uscion sucion cuison ucison ciuson icuson uicson iucson csiuon sciuon cisuon icsuon sicuon iscuon usicon suicon uiscon iuscon siucon isucon ousicn uosicn osuicn souicn usoicn suoicn ouiscn uoiscn oiuscn iouscn uioscn iuoscn osiucn soiucn oisucn iosucn sioucn isoucn usiocn suiocn uisocn iusocn siuocn isuocn cousni ocusni cuosni ucosni oucsni uocsni cosuni ocsuni csouni scouni oscuni socuni cusoni ucsoni csuoni scuoni usconi suconi ouscni uoscni osucni soucni usocni suocni counsi ocunsi cuonsi uconsi oucnsi uocnsi conusi ocnusi cnousi ncousi oncusi nocusi cunosi ucnosi cnuosi ncuosi uncosi nucosi ouncsi uoncsi onucsi noucsi unocsi nuocsi cosnui ocsnui csonui sconui oscnui socnui consui ocnsui cnosui ncosui oncsui nocsui csnoui scnoui cnsoui ncsoui sncoui nscoui osncui soncui onscui noscui snocui nsocui cusnoi ucsnoi csunoi scunoi uscnoi sucnoi cunsoi ucnsoi cnusoi ncusoi uncsoi nucsoi csnuoi scnuoi cnsuoi ncsuoi sncuoi nscuoi usncoi suncoi unscoi nuscoi snucoi nsucoi ousnci uosnci osunci sounci usonci suonci ounsci uonsci onusci nousci unosci nuosci osnuci sonuci onsuci nosuci snouci nsouci usnoci sunoci unsoci nusoci snuoci nsuoci couins ocuins cuoins ucoins oucins uocins coiuns ociuns ciouns icouns oicuns iocuns cuions ucions ciuons icuons uicons iucons ouicns uoicns oiucns ioucns uiocns iuocns counis ocunis cuonis uconis oucnis uocnis conuis ocnuis cnouis ncouis oncuis nocuis cunois ucnois cnuois ncuois uncois nucois ouncis uoncis onucis noucis unocis nuocis coinus ocinus cionus iconus oicnus iocnus conius ocnius cnoius ncoius oncius nocius cinous icnous cnious ncious incous nicous oincus ioncus onicus noicus inocus niocus cuinos ucinos ciunos icunos uicnos iucnos cunios ucnios cnuios ncuios uncios nucios cinuos icnuos cniuos nciuos incuos nicuos uincos iuncos unicos nuicos inucos niucos ouincs uoincs oiuncs iouncs uioncs iuoncs ounics uonics onuics nouics unoics nuoics oinucs ionucs oniucs noiucs inoucs nioucs uinocs iunocs uniocs nuiocs inuocs niuocs cosinu ocsinu csoinu scoinu oscinu socinu coisnu ocisnu ciosnu icosnu oicsnu iocsnu csionu scionu cisonu icsonu siconu isconu osicnu soicnu oiscnu ioscnu siocnu isocnu cosniu ocsniu csoniu sconiu oscniu socniu consiu ocnsiu cnosiu ncosiu oncsiu nocsiu csnoiu scnoiu cnsoiu ncsoiu sncoiu nscoiu osnciu sonciu onsciu nosciu snociu nsociu coinsu ocinsu cionsu iconsu oicnsu iocnsu conisu ocnisu cnoisu ncoisu oncisu nocisu cinosu icnosu cniosu nciosu incosu nicosu oincsu ioncsu onicsu noicsu inocsu niocsu csinou scinou cisnou icsnou sicnou iscnou csniou scniou cnsiou ncsiou snciou nsciou cinsou icnsou cnisou ncisou incsou nicsou sincou isncou snicou nsicou inscou niscou osincu soincu oisncu iosncu sioncu isoncu osnicu sonicu onsicu nosicu snoicu nsoicu oinscu ionscu oniscu noiscu inoscu nioscu sinocu isnocu sniocu nsiocu insocu nisocu cusino ucsino csuino scuino uscino sucino cuisno ucisno ciusno icusno uicsno iucsno csiuno sciuno cisuno icsuno sicuno iscuno usicno suicno uiscno iuscno siucno isucno cusnio ucsnio csunio scunio uscnio sucnio cunsio ucnsio cnusio ncusio uncsio nucsio csnuio scnuio cnsuio ncsuio sncuio nscuio usncio suncio unscio nuscio snucio nsucio cuinso ucinso ciunso icunso uicnso iucnso cuniso ucniso cnuiso ncuiso unciso nuciso cinuso icnuso cniuso nciuso incuso nicuso uincso iuncso unicso nuicso inucso niucso csinuo scinuo cisnuo icsnuo sicnuo iscnuo csniuo scniuo cnsiuo ncsiuo snciuo nsciuo cinsuo icnsuo cnisuo ncisuo incsuo nicsuo sincuo isncuo snicuo nsicuo inscuo niscuo usinco suinco uisnco iusnco siunco isunco usnico sunico unsico nusico snuico nsuico uinsco iunsco unisco nuisco inusco niusco sinuco isnuco sniuco nsiuco insuco nisuco ousinc uosinc osuinc souinc usoinc suoinc ouisnc uoisnc oiusnc iousnc uiosnc iuosnc osiunc soiunc oisunc iosunc siounc isounc usionc suionc uisonc iusonc siuonc isuonc ousnic uosnic osunic sounic usonic suonic ounsic uonsic onusic nousic unosic nuosic osnuic sonuic onsuic nosuic snouic nsouic usnoic sunoic unsoic nusoic snuoic nsuoic ouinsc uoinsc oiunsc iounsc uionsc iuonsc ounisc uonisc onuisc nouisc unoisc nuoisc oinusc ionusc oniusc noiusc inousc niousc uinosc iunosc uniosc nuiosc inuosc niuosc osinuc soinuc oisnuc iosnuc sionuc isonuc osniuc soniuc onsiuc nosiuc snoiuc nsoiuc oinsuc ionsuc onisuc noisuc inosuc niosuc sinouc isnouc sniouc nsiouc insouc nisouc usinoc suinoc uisnoc iusnoc siunoc isunoc usnioc sunioc unsioc nusioc snuioc nsuioc uinsoc iunsoc unisoc nuisoc inusoc niusoc sinuoc isnuoc sniuoc nsiuoc insuoc nisuoc
Note: these 'words' (valid or invalid) are all the permutations of the word cousin. These words are obtained by scrambling the letters in cousin.