niches inches ncihes cnihes icnhes cinhes nihces inhces nhices hnices ihnces hinces nchies cnhies nhcies hncies chnies hcnies ichnes cihnes ihcnes hicnes chines hcines nicehs incehs nciehs cniehs icnehs cinehs niechs inechs neichs enichs ienchs einchs nceihs cneihs necihs encihs cenihs ecnihs icenhs cienhs iecnhs eicnhs ceinhs ecinhs nihecs inhecs nhiecs hniecs ihnecs hinecs niehcs inehcs neihcs enihcs ienhcs einhcs nheics hneics nehics enhics henics ehnics ihencs hiencs iehncs eihncs heincs ehincs ncheis cnheis nhceis hnceis chneis hcneis ncehis cnehis nechis enchis cenhis ecnhis nhecis hnecis nehcis enhcis hencis ehncis chenis hcenis cehnis echnis hecnis ehcnis ichens cihens ihcens hicens chiens hciens icehns ciehns iechns eichns ceihns ecihns ihecns hiecns iehcns eihcns heicns ehicns cheins hceins cehins echins hecins ehcins nichse inchse ncihse cnihse icnhse cinhse nihcse inhcse nhicse hnicse ihncse hincse nchise cnhise nhcise hncise chnise hcnise ichnse cihnse ihcnse hicnse chinse hcinse nicshe incshe ncishe cnishe icnshe cinshe nische insche nsiche sniche isnche sinche ncsihe cnsihe nscihe sncihe csnihe scnihe icsnhe cisnhe iscnhe sicnhe csinhe scinhe nihsce inhsce nhisce hnisce ihnsce hinsce nishce inshce nsihce snihce isnhce sinhce nhsice hnsice nshice snhice hsnice shnice ihsnce hisnce ishnce sihnce hsince shince nchsie cnhsie nhcsie hncsie chnsie hcnsie ncshie cnshie nschie snchie csnhie scnhie nhscie hnscie nshcie snhcie hsncie shncie chsnie hcsnie cshnie schnie hscnie shcnie ichsne cihsne ihcsne hicsne chisne hcisne icshne cishne ischne sichne csihne scihne ihscne hiscne ishcne sihcne hsicne shicne chsine hcsine cshine schine hscine shcine nicesh incesh nciesh cniesh icnesh cinesh niecsh inecsh neicsh enicsh iencsh eincsh nceish cneish necish encish cenish ecnish icensh ciensh iecnsh eicnsh ceinsh ecinsh nicseh incseh nciseh cniseh icnseh cinseh nisceh insceh nsiceh sniceh isnceh sinceh ncsieh cnsieh nscieh sncieh csnieh scnieh icsneh cisneh iscneh sicneh csineh scineh niesch inesch neisch enisch iensch einsch nisech insech nsiech sniech isnech sinech nesich ensich nseich sneich esnich senich iesnch eisnch isench siench esinch seinch ncesih cnesih necsih encsih censih ecnsih ncseih cnseih nsceih snceih csneih scneih nescih enscih nsecih snecih esncih sencih cesnih ecsnih csenih scenih escnih secnih icesnh ciesnh iecsnh eicsnh ceisnh ecisnh icsenh cisenh iscenh sicenh csienh scienh iescnh eiscnh isecnh siecnh esicnh seicnh cesinh ecsinh cseinh sceinh escinh secinh nihesc inhesc nhiesc hniesc ihnesc hinesc niehsc inehsc neihsc enihsc ienhsc einhsc nheisc hneisc nehisc enhisc henisc ehnisc ihensc hiensc iehnsc eihnsc heinsc ehinsc nihsec inhsec nhisec hnisec ihnsec hinsec nishec inshec nsihec snihec isnhec sinhec nhsiec hnsiec nshiec snhiec hsniec shniec ihsnec hisnec ishnec sihnec hsinec shinec nieshc ineshc neishc enishc ienshc einshc nisehc insehc nsiehc sniehc isnehc sinehc nesihc ensihc nseihc sneihc esnihc senihc iesnhc eisnhc isenhc sienhc esinhc seinhc nhesic hnesic nehsic enhsic hensic ehnsic nhseic hnseic nsheic snheic hsneic shneic neshic enshic nsehic snehic esnhic senhic hesnic ehsnic hsenic shenic eshnic sehnic ihesnc hiesnc iehsnc eihsnc heisnc ehisnc ihsenc hisenc ishenc sihenc hsienc shienc ieshnc eishnc isehnc siehnc esihnc seihnc hesinc ehsinc hseinc sheinc eshinc sehinc nchesi cnhesi nhcesi hncesi chnesi hcnesi ncehsi cnehsi nechsi enchsi cenhsi ecnhsi nhecsi hnecsi nehcsi enhcsi hencsi ehncsi chensi hcensi cehnsi echnsi hecnsi ehcnsi nchsei cnhsei nhcsei hncsei chnsei hcnsei ncshei cnshei nschei snchei csnhei scnhei nhscei hnscei nshcei snhcei hsncei shncei chsnei hcsnei cshnei schnei hscnei shcnei nceshi cneshi necshi encshi censhi ecnshi ncsehi cnsehi nscehi sncehi csnehi scnehi neschi enschi nsechi snechi esnchi senchi cesnhi ecsnhi csenhi scenhi escnhi secnhi nhesci hnesci nehsci enhsci hensci ehnsci nhseci hnseci nsheci snheci hsneci shneci neshci enshci nsehci snehci esnhci senhci hesnci ehsnci hsenci shenci eshnci sehnci chesni hcesni cehsni echsni hecsni ehcsni chseni hcseni csheni scheni hsceni shceni ceshni ecshni csehni scehni eschni sechni hescni ehscni hsecni shecni eshcni sehcni ichesn cihesn ihcesn hicesn chiesn hciesn icehsn ciehsn iechsn eichsn ceihsn ecihsn ihecsn hiecsn iehcsn eihcsn heicsn ehicsn cheisn hceisn cehisn echisn hecisn ehcisn ichsen cihsen ihcsen hicsen chisen hcisen icshen cishen ischen sichen csihen scihen ihscen hiscen ishcen sihcen hsicen shicen chsien hcsien cshien schien hscien shcien iceshn cieshn iecshn eicshn ceishn ecishn icsehn cisehn iscehn sicehn csiehn sciehn ieschn eischn isechn siechn esichn seichn cesihn ecsihn cseihn sceihn escihn secihn ihescn hiescn iehscn eihscn heiscn ehiscn ihsecn hisecn ishecn sihecn hsiecn shiecn ieshcn eishcn isehcn siehcn esihcn seihcn hesicn ehsicn hseicn sheicn eshicn sehicn chesin hcesin cehsin echsin hecsin ehcsin chsein hcsein cshein schein hscein shcein ceshin ecshin csehin scehin eschin sechin hescin ehscin hsecin shecin eshcin sehcin
Note: these 'words' (valid or invalid) are all the permutations of the word niches. These words are obtained by scrambling the letters in niches.