niters inters ntiers tniers itners tiners nietrs inetrs neitrs enitrs ientrs eintrs nteirs tneirs netirs entirs tenirs etnirs itenrs tienrs ietnrs eitnrs teinrs etinrs nitres intres ntires tnires itnres tinres nirtes inrtes nrites rnites irntes rintes ntries tnries nrties rnties trnies rtnies itrnes tirnes irtnes ritnes trines rtines nierts inerts neirts enirts ienrts einrts nirets inrets nriets rniets irnets rinets nerits enrits nreits rneits ernits renits iernts eirnts irents rients erints reints nteris tneris netris entris tenris etnris ntreis tnreis nrteis rnteis trneis rtneis nertis enrtis nretis rnetis erntis rentis ternis etrnis trenis rtenis ertnis retnis iterns tierns ietrns eitrns teirns etirns itrens tirens irtens ritens triens rtiens iertns eirtns iretns rietns eritns reitns terins etrins treins rteins ertins retins nitesr intesr ntiesr tniesr itnesr tinesr nietsr inetsr neitsr enitsr ientsr eintsr nteisr tneisr netisr entisr tenisr etnisr itensr tiensr ietnsr eitnsr teinsr etinsr nitser intser ntiser tniser itnser tinser nister inster nsiter sniter isnter sinter ntsier tnsier nstier sntier tsnier stnier itsner tisner istner sitner tsiner stiner niestr inestr neistr enistr ienstr einstr nisetr insetr nsietr snietr isnetr sinetr nesitr ensitr nseitr sneitr esnitr senitr iesntr eisntr isentr sientr esintr seintr ntesir tnesir netsir entsir tensir etnsir ntseir tnseir nsteir snteir tsneir stneir nestir enstir nsetir snetir esntir sentir tesnir etsnir tsenir stenir estnir setnir itesnr tiesnr ietsnr eitsnr teisnr etisnr itsenr tisenr istenr sitenr tsienr stienr iestnr eistnr isetnr sietnr esitnr seitnr tesinr etsinr tseinr steinr estinr setinr nitrse intrse ntirse tnirse itnrse tinrse nirtse inrtse nritse rnitse irntse rintse ntrise tnrise nrtise rntise trnise rtnise itrnse tirnse irtnse ritnse trinse rtinse nitsre intsre ntisre tnisre itnsre tinsre nistre instre nsitre snitre isntre sintre ntsire tnsire nstire sntire tsnire stnire itsnre tisnre istnre sitnre tsinre stinre nirste inrste nriste rniste irnste rinste nisrte insrte nsirte snirte isnrte sinrte nrsite rnsite nsrite snrite rsnite srnite irsnte risnte isrnte sirnte rsinte srinte ntrsie tnrsie nrtsie rntsie trnsie rtnsie ntsrie tnsrie nstrie sntrie tsnrie stnrie nrstie rnstie nsrtie snrtie rsntie srntie trsnie rtsnie tsrnie strnie rstnie srtnie itrsne tirsne irtsne ritsne trisne rtisne itsrne tisrne istrne sitrne tsirne stirne irstne ristne isrtne sirtne rsitne sritne trsine rtsine tsrine strine rstine srtine nierst inerst neirst enirst ienrst einrst nirest inrest nriest rniest irnest rinest nerist enrist nreist rneist ernist renist iernst eirnst irenst rienst erinst reinst niesrt inesrt neisrt enisrt iensrt einsrt nisert insert nsiert sniert isnert sinert nesirt ensirt nseirt sneirt esnirt senirt iesnrt eisnrt isenrt sienrt esinrt seinrt nirset inrset nriset rniset irnset rinset nisret insret nsiret sniret isnret sinret nrsiet rnsiet nsriet snriet rsniet srniet irsnet risnet isrnet sirnet rsinet srinet nersit enrsit nresit rnesit ernsit rensit nesrit ensrit nserit snerit esnrit senrit nrseit rnseit nsreit snreit rsneit srneit ersnit resnit esrnit sernit rsenit srenit iersnt eirsnt iresnt riesnt erisnt reisnt iesrnt eisrnt isernt siernt esirnt seirnt irsent risent isrent sirent rsient srient ersint resint esrint serint rseint sreint ntersi tnersi netrsi entrsi tenrsi etnrsi ntresi tnresi nrtesi rntesi trnesi rtnesi nertsi enrtsi nretsi rnetsi erntsi rentsi ternsi etrnsi trensi rtensi ertnsi retnsi ntesri tnesri netsri entsri tensri etnsri ntseri tnseri nsteri snteri tsneri stneri nestri enstri nsetri snetri esntri sentri tesnri etsnri tsenri stenri estnri setnri ntrsei tnrsei nrtsei rntsei trnsei rtnsei ntsrei tnsrei nstrei sntrei tsnrei stnrei nrstei rnstei nsrtei snrtei rsntei srntei trsnei rtsnei tsrnei strnei rstnei srtnei nersti enrsti nresti rnesti ernsti rensti nesrti ensrti nserti snerti esnrti senrti nrseti rnseti nsreti snreti rsneti srneti ersnti resnti esrnti sernti rsenti srenti tersni etrsni tresni rtesni ertsni retsni tesrni etsrni tserni sterni estrni setrni trseni rtseni tsreni streni rsteni srteni erstni restni esrtni sertni rsetni sretni itersn tiersn ietrsn eitrsn teirsn etirsn itresn tiresn irtesn ritesn triesn rtiesn iertsn eirtsn iretsn rietsn eritsn reitsn terisn etrisn treisn rteisn ertisn retisn itesrn tiesrn ietsrn eitsrn teisrn etisrn itsern tisern istern sitern tsiern stiern iestrn eistrn isetrn sietrn esitrn seitrn tesirn etsirn tseirn steirn estirn setirn itrsen tirsen irtsen ritsen trisen rtisen itsren tisren istren sitren tsiren stiren irsten risten isrten sirten rsiten sriten trsien rtsien tsrien strien rstien srtien ierstn eirstn irestn riestn eristn reistn iesrtn eisrtn isertn siertn esirtn seirtn irsetn risetn isretn siretn rsietn srietn ersitn resitn esritn seritn rseitn sreitn tersin etrsin tresin rtesin ertsin retsin tesrin etsrin tserin sterin estrin setrin trsein rtsein tsrein strein rstein srtein erstin restin esrtin sertin rsetin sretin
Note: these 'words' (valid or invalid) are all the permutations of the word niters. These words are obtained by scrambling the letters in niters.