dering edring dreing rdeing erding reding deirng edirng dierng iderng eidrng iedrng drieng rdieng direng idreng rideng irdeng eridng reidng eirdng ierdng riedng iredng dernig edrnig drenig rdenig erdnig rednig denrig ednrig dnerig nderig endrig nedrig drneig rdneig dnreig ndreig rndeig nrdeig erndig rendig enrdig nerdig rnedig nredig deinrg edinrg dienrg idenrg eidnrg iednrg denirg ednirg dneirg ndeirg endirg nedirg dinerg idnerg dnierg ndierg inderg niderg eindrg iendrg enidrg neidrg inedrg niedrg drineg rdineg dirneg idrneg ridneg irdneg drnieg rdnieg dnrieg ndrieg rndieg nrdieg dinreg idnreg dnireg ndireg indreg nidreg rindeg irndeg rnideg nrideg inrdeg nirdeg erindg reindg eirndg ierndg riendg irendg ernidg renidg enridg neridg rneidg nreidg einrdg ienrdg enirdg neirdg inerdg nierdg rinedg irnedg rniedg nriedg inredg niredg derign edrign dreign rdeign erdign redign deirgn edirgn diergn idergn eidrgn iedrgn driegn rdiegn diregn idregn ridegn irdegn eridgn reidgn eirdgn ierdgn riedgn iredgn dergin edrgin dregin rdegin erdgin redgin degrin edgrin dgerin gderin egdrin gedrin drgein rdgein dgrein gdrein rgdein grdein ergdin regdin egrdin gerdin rgedin gredin deigrn edigrn diegrn idegrn eidgrn iedgrn degirn edgirn dgeirn gdeirn egdirn gedirn digern idgern dgiern gdiern igdern gidern eigdrn iegdrn egidrn geidrn igedrn giedrn drigen rdigen dirgen idrgen ridgen irdgen drgien rdgien dgrien gdrien rgdien grdien digren idgren dgiren gdiren igdren gidren rigden irgden rgiden griden igrden girden erigdn reigdn eirgdn iergdn riegdn iregdn ergidn regidn egridn geridn rgeidn greidn eigrdn iegrdn egirdn geirdn igerdn gierdn rigedn irgedn rgiedn griedn igredn giredn derngi edrngi drengi rdengi erdngi redngi denrgi ednrgi dnergi ndergi endrgi nedrgi drnegi rdnegi dnregi ndregi rndegi nrdegi erndgi rendgi enrdgi nerdgi rnedgi nredgi dergni edrgni dregni rdegni erdgni redgni degrni edgrni dgerni gderni egdrni gedrni drgeni rdgeni dgreni gdreni rgdeni grdeni ergdni regdni egrdni gerdni rgedni gredni dengri edngri dnegri ndegri endgri nedgri degnri edgnri dgenri gdenri egdnri gednri dngeri ndgeri dgneri gdneri ngderi gnderi engdri negdri egndri gendri ngedri gnedri drngei rdngei dnrgei ndrgei rndgei nrdgei drgnei rdgnei dgrnei gdrnei rgdnei grdnei dngrei ndgrei dgnrei gdnrei ngdrei gndrei rngdei nrgdei rgndei grndei ngrdei gnrdei erngdi rengdi enrgdi nergdi rnegdi nregdi ergndi regndi egrndi gerndi rgendi grendi engrdi negrdi egnrdi genrdi ngerdi gnerdi rngedi nrgedi rgnedi grnedi ngredi gnredi deingr edingr diengr idengr eidngr iedngr denigr ednigr dneigr ndeigr endigr nedigr dinegr idnegr dniegr ndiegr indegr nidegr eindgr iendgr enidgr neidgr inedgr niedgr deignr edignr diegnr idegnr eidgnr iedgnr deginr edginr dgeinr gdeinr egdinr gedinr digenr idgenr dgienr gdienr igdenr gidenr eigdnr iegdnr egidnr geidnr igednr giednr dengir edngir dnegir ndegir endgir nedgir degnir edgnir dgenir gdenir egdnir gednir dngeir ndgeir dgneir gdneir ngdeir gndeir engdir negdir egndir gendir ngedir gnedir dinger idnger dniger ndiger indger nidger digner idgner dginer gdiner igdner gidner dngier ndgier dgnier gdnier ngdier gndier ingder nigder ignder ginder ngider gnider eingdr iengdr enigdr neigdr inegdr niegdr eigndr iegndr egindr geindr igendr giendr engidr negidr egnidr genidr ngeidr gneidr ingedr nigedr ignedr ginedr ngiedr gniedr dringe rdinge dirnge idrnge ridnge irdnge drnige rdnige dnrige ndrige rndige nrdige dinrge idnrge dnirge ndirge indrge nidrge rindge irndge rnidge nridge inrdge nirdge drigne rdigne dirgne idrgne ridgne irdgne drgine rdgine dgrine gdrine rgdine grdine digrne idgrne dgirne gdirne igdrne gidrne rigdne irgdne rgidne gridne igrdne girdne drngie rdngie dnrgie ndrgie rndgie nrdgie drgnie rdgnie dgrnie gdrnie rgdnie grdnie dngrie ndgrie dgnrie gdnrie ngdrie gndrie rngdie nrgdie rgndie grndie ngrdie gnrdie dingre idngre dnigre ndigre indgre nidgre dignre idgnre dginre gdinre igdnre gidnre dngire ndgire dgnire gdnire ngdire gndire ingdre nigdre igndre gindre ngidre gnidre ringde irngde rnigde nrigde inrgde nirgde rignde irgnde rginde grinde igrnde girnde rngide nrgide rgnide grnide ngride gnride ingrde nigrde ignrde ginrde ngirde gnirde eringd reingd eirngd ierngd riengd irengd ernigd renigd enrigd nerigd rneigd nreigd einrgd ienrgd enirgd neirgd inergd niergd rinegd irnegd rniegd nriegd inregd niregd erignd reignd eirgnd iergnd riegnd iregnd ergind regind egrind gerind rgeind greind eigrnd iegrnd egirnd geirnd igernd giernd rigend irgend rgiend griend igrend girend erngid rengid enrgid nergid rnegid nregid ergnid regnid egrnid gernid rgenid grenid engrid negrid egnrid genrid ngerid gnerid rngeid nrgeid rgneid grneid ngreid gnreid eingrd iengrd enigrd neigrd inegrd niegrd eignrd iegnrd eginrd geinrd igenrd gienrd engird negird egnird genird ngeird gneird ingerd nigerd ignerd ginerd ngierd gnierd ringed irnged rniged nriged inrged nirged rigned irgned rgined grined igrned girned rngied nrgied rgnied grnied ngried gnried ingred nigred ignred ginred ngired gnired
Note: these 'words' (valid or invalid) are all the permutations of the word dering. These words are obtained by scrambling the letters in dering.