nirled inrled nriled rniled irnled rinled nilred inlred nlired lnired ilnred linred nrlied rnlied nlried lnried rlnied lrnied irlned rilned ilrned lirned rlined lrined nireld inreld nrield rnield irneld rineld nierld inerld neirld enirld ienrld einrld nreild rneild nerild enrild renild ernild irenld rienld iernld eirnld reinld erinld nilerd inlerd nlierd lnierd ilnerd linerd nielrd inelrd neilrd enilrd ienlrd einlrd nleird lneird nelird enlird lenird elnird ilenrd lienrd ielnrd eilnrd leinrd elinrd nrleid rnleid nlreid lnreid rlneid lrneid nrelid rnelid nerlid enrlid renlid ernlid nlerid lnerid nelrid enlrid lenrid elnrid rlenid lrenid relnid erlnid lernid elrnid irlend rilend ilrend lirend rliend lriend irelnd rielnd ierlnd eirlnd reilnd erilnd ilernd liernd ielrnd eilrnd leirnd elirnd rleind lreind relind erlind lerind elrind nirlde inrlde nrilde rnilde irnlde rinlde nilrde inlrde nlirde lnirde ilnrde linrde nrlide rnlide nlride lnride rlnide lrnide irlnde rilnde ilrnde lirnde rlinde lrinde nirdle inrdle nridle rnidle irndle rindle nidrle indrle ndirle dnirle idnrle dinrle nrdile rndile ndrile dnrile rdnile drnile irdnle ridnle idrnle dirnle rdinle drinle nildre inldre nlidre lnidre ilndre lindre nidlre indlre ndilre dnilre idnlre dinlre nldire lndire ndlire dnlire ldnire dlnire ildnre lidnre idlnre dilnre ldinre dlinre nrldie rnldie nlrdie lnrdie rlndie lrndie nrdlie rndlie ndrlie dnrlie rdnlie drnlie nldrie lndrie ndlrie dnlrie ldnrie dlnrie rldnie lrdnie rdlnie drlnie ldrnie dlrnie irldne rildne ilrdne lirdne rlidne lridne irdlne ridlne idrlne dirlne rdilne drilne ildrne lidrne idlrne dilrne ldirne dlirne rldine lrdine rdline drline ldrine dlrine niredl inredl nriedl rniedl irnedl rinedl nierdl inerdl neirdl enirdl ienrdl einrdl nreidl rneidl neridl enridl renidl ernidl irendl riendl ierndl eirndl reindl erindl nirdel inrdel nridel rnidel irndel rindel nidrel indrel ndirel dnirel idnrel dinrel nrdiel rndiel ndriel dnriel rdniel drniel irdnel ridnel idrnel dirnel rdinel drinel niedrl inedrl neidrl enidrl iendrl eindrl niderl inderl ndierl dnierl idnerl dinerl nedirl endirl ndeirl dneirl ednirl denirl iednrl eidnrl idenrl dienrl edinrl deinrl nredil rnedil nerdil enrdil rendil erndil nrdeil rndeil ndreil dnreil rdneil drneil nedril endril nderil dneril ednril denril rednil erdnil rdenil drenil edrnil dernil irednl riednl ierdnl eirdnl reidnl eridnl irdenl ridenl idrenl direnl rdienl drienl iedrnl eidrnl idernl diernl edirnl deirnl redinl erdinl rdeinl dreinl edrinl derinl niledr inledr nliedr lniedr ilnedr linedr nieldr ineldr neildr enildr ienldr einldr nleidr lneidr nelidr enlidr lenidr elnidr ilendr liendr ielndr eilndr leindr elindr nilder inlder nlider lnider ilnder linder nidler indler ndiler dniler idnler dinler nldier lndier ndlier dnlier ldnier dlnier ildner lidner idlner dilner ldiner dliner niedlr inedlr neidlr enidlr iendlr eindlr nidelr indelr ndielr dnielr idnelr dinelr nedilr endilr ndeilr dneilr ednilr denilr iednlr eidnlr idenlr dienlr edinlr deinlr nledir lnedir neldir enldir lendir elndir nldeir lndeir ndleir dnleir ldneir dlneir nedlir endlir ndelir dnelir ednlir denlir lednir eldnir ldenir dlenir edlnir delnir ilednr liednr ieldnr eildnr leidnr elidnr ildenr lidenr idlenr dilenr ldienr dlienr iedlnr eidlnr idelnr dielnr edilnr deilnr ledinr eldinr ldeinr dleinr edlinr delinr nrledi rnledi nlredi lnredi rlnedi lrnedi nreldi rneldi nerldi enrldi renldi ernldi nlerdi lnerdi nelrdi enlrdi lenrdi elnrdi rlendi lrendi relndi erlndi lerndi elrndi nrldei rnldei nlrdei lnrdei rlndei lrndei nrdlei rndlei ndrlei dnrlei rdnlei drnlei nldrei lndrei ndlrei dnlrei ldnrei dlnrei rldnei lrdnei rdlnei drlnei ldrnei dlrnei nredli rnedli nerdli enrdli rendli erndli nrdeli rndeli ndreli dnreli rdneli drneli nedrli endrli nderli dnerli ednrli denrli rednli erdnli rdenli drenli edrnli dernli nledri lnedri neldri enldri lendri elndri nlderi lnderi ndleri dnleri ldneri dlneri nedlri endlri ndelri dnelri ednlri denlri lednri eldnri ldenri dlenri edlnri delnri rledni lredni reldni erldni lerdni elrdni rldeni lrdeni rdleni drleni ldreni dlreni redlni erdlni rdelni drelni edrlni derlni ledrni eldrni lderni dlerni edlrni delrni irledn riledn ilredn liredn rliedn lriedn ireldn rieldn ierldn eirldn reildn erildn ilerdn lierdn ielrdn eilrdn leirdn elirdn rleidn lreidn relidn erlidn leridn elridn irlden rilden ilrden lirden rliden lriden irdlen ridlen idrlen dirlen rdilen drilen ildren lidren idlren dilren ldiren dliren rldien lrdien rdlien drlien ldrien dlrien iredln riedln ierdln eirdln reidln eridln irdeln rideln idreln direln rdieln drieln iedrln eidrln iderln dierln edirln deirln rediln erdiln rdeiln dreiln edriln deriln iledrn liedrn ieldrn eildrn leidrn elidrn ildern lidern idlern dilern ldiern dliern iedlrn eidlrn idelrn dielrn edilrn deilrn ledirn eldirn ldeirn dleirn edlirn delirn rledin lredin reldin erldin lerdin elrdin rldein lrdein rdlein drlein ldrein dlrein redlin erdlin rdelin drelin edrlin derlin ledrin eldrin lderin dlerin edlrin delrin
Note: these 'words' (valid or invalid) are all the permutations of the word nirled. These words are obtained by scrambling the letters in nirled.