ruings urings riungs irungs uirngs iurngs runigs urnigs rnuigs nruigs unrigs nurigs rinugs irnugs rniugs nriugs inrugs nirugs uinrgs iunrgs unirgs nuirgs inurgs niurgs ruigns urigns riugns irugns uirgns iurgns rugins urgins rguins gruins ugrins gurins riguns irguns rgiuns griuns igruns giruns uigrns iugrns ugirns guirns igurns giurns rungis urngis rnugis nrugis unrgis nurgis rugnis urgnis rgunis grunis ugrnis gurnis rnguis nrguis rgnuis grnuis ngruis gnruis ungris nugris ugnris gunris nguris gnuris ringus irngus rnigus nrigus inrgus nirgus rignus irgnus rginus grinus igrnus girnus rngius nrgius rgnius grnius ngrius gnrius ingrus nigrus ignrus ginrus ngirus gnirus uingrs iungrs unigrs nuigrs inugrs niugrs uignrs iugnrs uginrs guinrs igunrs giunrs ungirs nugirs ugnirs gunirs nguirs gnuirs ingurs nigurs ignurs ginurs ngiurs gniurs ruinsg urinsg riunsg irunsg uirnsg iurnsg runisg urnisg rnuisg nruisg unrisg nurisg rinusg irnusg rniusg nriusg inrusg nirusg uinrsg iunrsg unirsg nuirsg inursg niursg ruisng urisng riusng irusng uirsng iursng rusing ursing rsuing sruing usring suring risung irsung rsiung sriung isrung sirung uisrng iusrng usirng suirng isurng siurng runsig urnsig rnusig nrusig unrsig nursig rusnig ursnig rsunig srunig usrnig surnig rnsuig nrsuig rsnuig srnuig nsruig snruig unsrig nusrig usnrig sunrig nsurig snurig rinsug irnsug rnisug nrisug inrsug nirsug risnug irsnug rsinug srinug isrnug sirnug rnsiug nrsiug rsniug srniug nsriug snriug insrug nisrug isnrug sinrug nsirug snirug uinsrg iunsrg unisrg nuisrg inusrg niusrg uisnrg iusnrg usinrg suinrg isunrg siunrg unsirg nusirg usnirg sunirg nsuirg snuirg insurg nisurg isnurg sinurg nsiurg sniurg ruigsn urigsn riugsn irugsn uirgsn iurgsn rugisn urgisn rguisn gruisn ugrisn gurisn rigusn irgusn rgiusn griusn igrusn girusn uigrsn iugrsn ugirsn guirsn igursn giursn ruisgn urisgn riusgn irusgn uirsgn iursgn rusign ursign rsuign sruign usrign surign risugn irsugn rsiugn sriugn isrugn sirugn uisrgn iusrgn usirgn suirgn isurgn siurgn rugsin urgsin rgusin grusin ugrsin gursin rusgin ursgin rsugin srugin usrgin surgin rgsuin grsuin rsguin srguin gsruin sgruin ugsrin gusrin usgrin sugrin gsurin sgurin rigsun irgsun rgisun grisun igrsun girsun risgun irsgun rsigun srigun isrgun sirgun rgsiun grsiun rsgiun srgiun gsriun sgriun igsrun gisrun isgrun sigrun gsirun sgirun uigsrn iugsrn ugisrn guisrn igusrn giusrn uisgrn iusgrn usigrn suigrn isugrn siugrn ugsirn gusirn usgirn sugirn gsuirn sguirn igsurn gisurn isgurn sigurn gsiurn sgiurn rungsi urngsi rnugsi nrugsi unrgsi nurgsi rugnsi urgnsi rgunsi grunsi ugrnsi gurnsi rngusi nrgusi rgnusi grnusi ngrusi gnrusi ungrsi nugrsi ugnrsi gunrsi ngursi gnursi runsgi urnsgi rnusgi nrusgi unrsgi nursgi rusngi ursngi rsungi srungi usrngi surngi rnsugi nrsugi rsnugi srnugi nsrugi snrugi unsrgi nusrgi usnrgi sunrgi nsurgi snurgi rugsni urgsni rgusni grusni ugrsni gursni rusgni ursgni rsugni srugni usrgni surgni rgsuni grsuni rsguni srguni gsruni sgruni ugsrni gusrni usgrni sugrni gsurni sgurni rngsui nrgsui rgnsui grnsui ngrsui gnrsui rnsgui nrsgui rsngui srngui nsrgui snrgui rgsnui grsnui rsgnui srgnui gsrnui sgrnui ngsrui gnsrui nsgrui sngrui gsnrui sgnrui ungsri nugsri ugnsri gunsri ngusri gnusri unsgri nusgri usngri sungri nsugri snugri ugsnri gusnri usgnri sugnri gsunri sgunri ngsuri gnsuri nsguri snguri gsnuri sgnuri ringsu irngsu rnigsu nrigsu inrgsu nirgsu rignsu irgnsu rginsu grinsu igrnsu girnsu rngisu nrgisu rgnisu grnisu ngrisu gnrisu ingrsu nigrsu ignrsu ginrsu ngirsu gnirsu rinsgu irnsgu rnisgu nrisgu inrsgu nirsgu risngu irsngu rsingu sringu isrngu sirngu rnsigu nrsigu rsnigu srnigu nsrigu snrigu insrgu nisrgu isnrgu sinrgu nsirgu snirgu rigsnu irgsnu rgisnu grisnu igrsnu girsnu risgnu irsgnu rsignu srignu isrgnu sirgnu rgsinu grsinu rsginu srginu gsrinu sgrinu igsrnu gisrnu isgrnu sigrnu gsirnu sgirnu rngsiu nrgsiu rgnsiu grnsiu ngrsiu gnrsiu rnsgiu nrsgiu rsngiu srngiu nsrgiu snrgiu rgsniu grsniu rsgniu srgniu gsrniu sgrniu ngsriu gnsriu nsgriu sngriu gsnriu sgnriu ingsru nigsru ignsru ginsru ngisru gnisru insgru nisgru isngru singru nsigru snigru igsnru gisnru isgnru signru gsinru sginru ngsiru gnsiru nsgiru sngiru gsniru sgniru uingsr iungsr unigsr nuigsr inugsr niugsr uignsr iugnsr uginsr guinsr igunsr giunsr ungisr nugisr ugnisr gunisr nguisr gnuisr ingusr nigusr ignusr ginusr ngiusr gniusr uinsgr iunsgr unisgr nuisgr inusgr niusgr uisngr iusngr usingr suingr isungr siungr unsigr nusigr usnigr sunigr nsuigr snuigr insugr nisugr isnugr sinugr nsiugr sniugr uigsnr iugsnr ugisnr guisnr igusnr giusnr uisgnr iusgnr usignr suignr isugnr siugnr ugsinr gusinr usginr suginr gsuinr sguinr igsunr gisunr isgunr sigunr gsiunr sgiunr ungsir nugsir ugnsir gunsir ngusir gnusir unsgir nusgir usngir sungir nsugir snugir ugsnir gusnir usgnir sugnir gsunir sgunir ngsuir gnsuir nsguir snguir gsnuir sgnuir ingsur nigsur ignsur ginsur ngisur gnisur insgur nisgur isngur singur nsigur snigur igsnur gisnur isgnur signur gsinur sginur ngsiur gnsiur nsgiur sngiur gsniur sgniur
Note: these 'words' (valid or invalid) are all the permutations of the word ruings. These words are obtained by scrambling the letters in ruings.