nirops inrops nriops rniops irnops rinops niorps inorps noirps onirps ionrps oinrps nroips rnoips norips onrips ronips ornips ironps rionps iornps oirnps roinps orinps nirpos inrpos nripos rnipos irnpos rinpos nipros inpros npiros pniros ipnros pinros nrpios rnpios nprios pnrios rpnios prnios irpnos ripnos iprnos pirnos rpinos prinos nioprs inoprs noiprs oniprs ionprs oinprs nipors inpors npiors pniors ipnors pinors nopirs onpirs npoirs pnoirs opnirs ponirs iopnrs oipnrs iponrs pionrs opinrs poinrs nropis rnopis norpis onrpis ronpis ornpis nrpois rnpois nprois pnrois rpnois prnois nopris onpris nporis pnoris opnris ponris ropnis orpnis rponis pronis oprnis pornis iropns riopns iorpns oirpns roipns oripns irpons ripons iprons pirons rpions prions ioprns oiprns iporns piorns opirns poirns ropins orpins rpoins proins oprins porins nirosp inrosp nriosp rniosp irnosp rinosp niorsp inorsp noirsp onirsp ionrsp oinrsp nroisp rnoisp norisp onrisp ronisp ornisp ironsp rionsp iornsp oirnsp roinsp orinsp nirsop inrsop nrisop rnisop irnsop rinsop nisrop insrop nsirop snirop isnrop sinrop nrsiop rnsiop nsriop snriop rsniop srniop irsnop risnop isrnop sirnop rsinop srinop niosrp inosrp noisrp onisrp ionsrp oinsrp nisorp insorp nsiorp sniorp isnorp sinorp nosirp onsirp nsoirp snoirp osnirp sonirp iosnrp oisnrp isonrp sionrp osinrp soinrp nrosip rnosip norsip onrsip ronsip ornsip nrsoip rnsoip nsroip snroip rsnoip srnoip nosrip onsrip nsorip snorip osnrip sonrip rosnip orsnip rsonip sronip osrnip sornip irosnp riosnp iorsnp oirsnp roisnp orisnp irsonp risonp isronp sironp rsionp srionp iosrnp oisrnp isornp siornp osirnp soirnp rosinp orsinp rsoinp sroinp osrinp sorinp nirpso inrpso nripso rnipso irnpso rinpso niprso inprso npirso pnirso ipnrso pinrso nrpiso rnpiso npriso pnriso rpniso prniso irpnso ripnso iprnso pirnso rpinso prinso nirspo inrspo nrispo rnispo irnspo rinspo nisrpo insrpo nsirpo snirpo isnrpo sinrpo nrsipo rnsipo nsripo snripo rsnipo srnipo irsnpo risnpo isrnpo sirnpo rsinpo srinpo nipsro inpsro npisro pnisro ipnsro pinsro nispro inspro nsipro snipro isnpro sinpro npsiro pnsiro nspiro snpiro psniro spniro ipsnro pisnro ispnro sipnro psinro spinro nrpsio rnpsio nprsio pnrsio rpnsio prnsio nrspio rnspio nsrpio snrpio rsnpio srnpio npsrio pnsrio nsprio snprio psnrio spnrio rpsnio prsnio rspnio srpnio psrnio sprnio irpsno ripsno iprsno pirsno rpisno prisno irspno rispno isrpno sirpno rsipno sripno ipsrno pisrno isprno siprno psirno spirno rpsino prsino rspino srpino psrino sprino niopsr inopsr noipsr onipsr ionpsr oinpsr niposr inposr npiosr pniosr ipnosr pinosr nopisr onpisr npoisr pnoisr opnisr ponisr iopnsr oipnsr iponsr pionsr opinsr poinsr niospr inospr noispr onispr ionspr oinspr nisopr insopr nsiopr sniopr isnopr sinopr nosipr onsipr nsoipr snoipr osnipr sonipr iosnpr oisnpr isonpr sionpr osinpr soinpr nipsor inpsor npisor pnisor ipnsor pinsor nispor inspor nsipor snipor isnpor sinpor npsior pnsior nspior snpior psnior spnior ipsnor pisnor ispnor sipnor psinor spinor nopsir onpsir nposir pnosir opnsir ponsir nospir onspir nsopir snopir osnpir sonpir npsoir pnsoir nspoir snpoir psnoir spnoir opsnir posnir ospnir sopnir psonir sponir iopsnr oipsnr iposnr piosnr opisnr poisnr iospnr oispnr isopnr siopnr osipnr soipnr ipsonr pisonr isponr siponr psionr spionr opsinr posinr ospinr sopinr psoinr spoinr nropsi rnopsi norpsi onrpsi ronpsi ornpsi nrposi rnposi nprosi pnrosi rpnosi prnosi noprsi onprsi nporsi pnorsi opnrsi ponrsi ropnsi orpnsi rponsi pronsi oprnsi pornsi nrospi rnospi norspi onrspi ronspi ornspi nrsopi rnsopi nsropi snropi rsnopi srnopi nosrpi onsrpi nsorpi snorpi osnrpi sonrpi rosnpi orsnpi rsonpi sronpi osrnpi sornpi nrpsoi rnpsoi nprsoi pnrsoi rpnsoi prnsoi nrspoi rnspoi nsrpoi snrpoi rsnpoi srnpoi npsroi pnsroi nsproi snproi psnroi spnroi rpsnoi prsnoi rspnoi srpnoi psrnoi sprnoi nopsri onpsri nposri pnosri opnsri ponsri nospri onspri nsopri snopri osnpri sonpri npsori pnsori nspori snpori psnori spnori opsnri posnri ospnri sopnri psonri sponri ropsni orpsni rposni prosni oprsni porsni rospni orspni rsopni sropni osrpni sorpni rpsoni prsoni rsponi srponi psroni sproni opsrni posrni osprni soprni psorni sporni iropsn riopsn iorpsn oirpsn roipsn oripsn irposn riposn iprosn pirosn rpiosn priosn ioprsn oiprsn iporsn piorsn opirsn poirsn ropisn orpisn rpoisn proisn oprisn porisn irospn riospn iorspn oirspn roispn orispn irsopn risopn isropn siropn rsiopn sriopn iosrpn oisrpn isorpn siorpn osirpn soirpn rosipn orsipn rsoipn sroipn osripn soripn irpson ripson iprson pirson rpison prison irspon rispon isrpon sirpon rsipon sripon ipsron pisron ispron sipron psiron spiron rpsion prsion rspion srpion psrion sprion iopsrn oipsrn iposrn piosrn opisrn poisrn iosprn oisprn isoprn sioprn osiprn soiprn ipsorn pisorn isporn siporn psiorn spiorn opsirn posirn ospirn sopirn psoirn spoirn ropsin orpsin rposin prosin oprsin porsin rospin orspin rsopin sropin osrpin sorpin rpsoin prsoin rspoin srpoin psroin sproin opsrin posrin osprin soprin psorin sporin
Note: these 'words' (valid or invalid) are all the permutations of the word nirops. These words are obtained by scrambling the letters in nirops.