ufrain furain urfain rufain fruain rfuain ufarin fuarin uafrin aufrin faurin afurin urafin ruafin uarfin aurfin raufin arufin frauin rfauin faruin afruin rafuin arfuin ufrian furian urfian rufian fruian rfuian ufiran fuiran uifran iufran fiuran ifuran urifan ruifan uirfan iurfan riufan irufan friuan rfiuan firuan ifruan rifuan irfuan ufairn fuairn uafirn aufirn fauirn afuirn ufiarn fuiarn uifarn iufarn fiuarn ifuarn uaifrn auifrn uiafrn iuafrn aiufrn iaufrn faiurn afiurn fiaurn ifaurn aifurn iafurn uraifn ruaifn uarifn aurifn rauifn aruifn uriafn ruiafn uirafn iurafn riuafn iruafn uairfn auirfn uiarfn iuarfn aiurfn iaurfn raiufn ariufn riaufn iraufn airufn iarufn fraiun rfaiun fariun afriun rafiun arfiun friaun rfiaun firaun ifraun rifaun irfaun fairun afirun fiarun ifarun aifrun iafrun raifun arifun riafun irafun airfun iarfun ufrani furani urfani rufani fruani rfuani ufarni fuarni uafrni aufrni faurni afurni urafni ruafni uarfni aurfni raufni arufni frauni rfauni faruni afruni rafuni arfuni ufrnai furnai urfnai rufnai frunai rfunai ufnrai funrai unfrai nufrai fnurai nfurai urnfai runfai unrfai nurfai rnufai nrufai frnuai rfnuai fnruai nfruai rnfuai nrfuai ufanri fuanri uafnri aufnri faunri afunri ufnari funari unfari nufari fnuari nfuari uanfri aunfri unafri nuafri anufri naufri fanuri afnuri fnauri nfauri anfuri nafuri uranfi ruanfi uarnfi aurnfi raunfi arunfi urnafi runafi unrafi nurafi rnuafi nruafi uanrfi aunrfi unarfi nuarfi anurfi naurfi ranufi arnufi rnaufi nraufi anrufi narufi franui rfanui farnui afrnui rafnui arfnui frnaui rfnaui fnraui nfraui rnfaui nrfaui fanrui afnrui fnarui nfarui anfrui nafrui ranfui arnfui rnafui nrafui anrfui narfui ufrina furina urfina rufina fruina rfuina ufirna fuirna uifrna iufrna fiurna ifurna urifna ruifna uirfna iurfna riufna irufna friuna rfiuna firuna ifruna rifuna irfuna ufrnia furnia urfnia rufnia frunia rfunia ufnria funria unfria nufria fnuria nfuria urnfia runfia unrfia nurfia rnufia nrufia frnuia rfnuia fnruia nfruia rnfuia nrfuia ufinra fuinra uifnra iufnra fiunra ifunra ufnira funira unfira nufira fnuira nfuira uinfra iunfra unifra nuifra inufra niufra finura ifnura fniura nfiura infura nifura urinfa ruinfa uirnfa iurnfa riunfa irunfa urnifa runifa unrifa nurifa rnuifa nruifa uinrfa iunrfa unirfa nuirfa inurfa niurfa rinufa irnufa rniufa nriufa inrufa nirufa frinua rfinua firnua ifrnua rifnua irfnua frniua rfniua fnriua nfriua rnfiua nrfiua finrua ifnrua fnirua nfirua infrua nifrua rinfua irnfua rnifua nrifua inrfua nirfua ufainr fuainr uafinr aufinr fauinr afuinr ufianr fuianr uifanr iufanr fiuanr ifuanr uaifnr auifnr uiafnr iuafnr aiufnr iaufnr faiunr afiunr fiaunr ifaunr aifunr iafunr ufanir fuanir uafnir aufnir faunir afunir ufnair funair unfair nufair fnuair nfuair uanfir aunfir unafir nuafir anufir naufir fanuir afnuir fnauir nfauir anfuir nafuir ufinar fuinar uifnar iufnar fiunar ifunar ufniar funiar unfiar nufiar fnuiar nfuiar uinfar iunfar unifar nuifar inufar niufar finuar ifnuar fniuar nfiuar infuar nifuar uainfr auinfr uianfr iuanfr aiunfr iaunfr uanifr aunifr unaifr nuaifr anuifr nauifr uinafr iunafr uniafr nuiafr inuafr niuafr ainufr ianufr aniufr naiufr inaufr niaufr fainur afinur fianur ifanur aifnur iafnur faniur afniur fnaiur nfaiur anfiur nafiur finaur ifnaur fniaur nfiaur infaur nifaur ainfur ianfur anifur naifur inafur niafur urainf ruainf uarinf aurinf rauinf aruinf urianf ruianf uiranf iuranf riuanf iruanf uairnf auirnf uiarnf iuarnf aiurnf iaurnf raiunf ariunf riaunf iraunf airunf iarunf uranif ruanif uarnif aurnif raunif arunif urnaif runaif unraif nuraif rnuaif nruaif uanrif aunrif unarif nuarif anurif naurif ranuif arnuif rnauif nrauif anruif naruif urinaf ruinaf uirnaf iurnaf riunaf irunaf urniaf runiaf unriaf nuriaf rnuiaf nruiaf uinraf iunraf uniraf nuiraf inuraf niuraf rinuaf irnuaf rniuaf nriuaf inruaf niruaf uainrf auinrf uianrf iuanrf aiunrf iaunrf uanirf aunirf unairf nuairf anuirf nauirf uinarf iunarf uniarf nuiarf inuarf niuarf ainurf ianurf aniurf naiurf inaurf niaurf rainuf arinuf rianuf iranuf airnuf iarnuf raniuf arniuf rnaiuf nraiuf anriuf nariuf rinauf irnauf rniauf nriauf inrauf nirauf ainruf ianruf aniruf nairuf inaruf niaruf frainu rfainu farinu afrinu rafinu arfinu frianu rfianu firanu ifranu rifanu irfanu fairnu afirnu fiarnu ifarnu aifrnu iafrnu raifnu arifnu riafnu irafnu airfnu iarfnu franiu rfaniu farniu afrniu rafniu arfniu frnaiu rfnaiu fnraiu nfraiu rnfaiu nrfaiu fanriu afnriu fnariu nfariu anfriu nafriu ranfiu arnfiu rnafiu nrafiu anrfiu narfiu frinau rfinau firnau ifrnau rifnau irfnau frniau rfniau fnriau nfriau rnfiau nrfiau finrau ifnrau fnirau nfirau infrau nifrau rinfau irnfau rnifau nrifau inrfau nirfau fainru afinru fianru ifanru aifnru iafnru faniru afniru fnairu nfairu anfiru nafiru finaru ifnaru fniaru nfiaru infaru nifaru ainfru ianfru anifru naifru inafru niafru rainfu arinfu rianfu iranfu airnfu iarnfu ranifu arnifu rnaifu nraifu anrifu narifu rinafu irnafu rniafu nriafu inrafu nirafu ainrfu ianrfu anirfu nairfu inarfu niarfu
Note: these 'words' (valid or invalid) are all the permutations of the word ufrain. These words are obtained by scrambling the letters in ufrain.