niners inners nniers nniers inners niners nienrs inenrs neinrs eninrs iennrs einnrs nneirs nneirs nenirs ennirs nenirs ennirs inenrs nienrs iennrs einnrs neinrs eninrs ninres innres nnires nnires innres ninres nirnes inrnes nrines rnines irnnes rinnes nnries nnries nrnies rnnies nrnies rnnies inrnes nirnes irnnes rinnes nrines rnines nierns inerns neirns enirns ienrns einrns nirens inrens nriens rniens irnens rinens nerins enrins nreins rneins ernins renins iernns eirnns irenns rienns erinns reinns nneris nneris nenris ennris nenris ennris nnreis nnreis nrneis rnneis nrneis rnneis nernis enrnis nrenis rnenis ernnis rennis nernis enrnis nrenis rnenis ernnis rennis inerns nierns ienrns einrns neirns enirns inrens nirens irnens rinens nriens rniens iernns eirnns irenns rienns erinns reinns nerins enrins nreins rneins ernins renins ninesr innesr nniesr nniesr innesr ninesr niensr inensr neinsr eninsr iennsr einnsr nneisr nneisr nenisr ennisr nenisr ennisr inensr niensr iennsr einnsr neinsr eninsr ninser innser nniser nniser innser ninser nisner insner nsiner sniner isnner sinner nnsier nnsier nsnier snnier nsnier snnier insner nisner isnner sinner nsiner sniner niesnr inesnr neisnr enisnr iensnr einsnr nisenr insenr nsienr snienr isnenr sinenr nesinr ensinr nseinr sneinr esninr seninr iesnnr eisnnr isennr siennr esinnr seinnr nnesir nnesir nensir ennsir nensir ennsir nnseir nnseir nsneir snneir nsneir snneir nesnir ensnir nsenir snenir esnnir sennir nesnir ensnir nsenir snenir esnnir sennir inesnr niesnr iensnr einsnr neisnr enisnr insenr nisenr isnenr sinenr nsienr snienr iesnnr eisnnr isennr siennr esinnr seinnr nesinr ensinr nseinr sneinr esninr seninr ninrse innrse nnirse nnirse innrse ninrse nirnse inrnse nrinse rninse irnnse rinnse nnrise nnrise nrnise rnnise nrnise rnnise inrnse nirnse irnnse rinnse nrinse rninse ninsre innsre nnisre nnisre innsre ninsre nisnre insnre nsinre sninre isnnre sinnre nnsire nnsire nsnire snnire nsnire snnire insnre nisnre isnnre sinnre nsinre sninre nirsne inrsne nrisne rnisne irnsne rinsne nisrne insrne nsirne snirne isnrne sinrne nrsine rnsine nsrine snrine rsnine srnine irsnne risnne isrnne sirnne rsinne srinne nnrsie nnrsie nrnsie rnnsie nrnsie rnnsie nnsrie nnsrie nsnrie snnrie nsnrie snnrie nrsnie rnsnie nsrnie snrnie rsnnie srnnie nrsnie rnsnie nsrnie snrnie rsnnie srnnie inrsne nirsne irnsne rinsne nrisne rnisne insrne nisrne isnrne sinrne nsirne snirne irsnne risnne isrnne sirnne rsinne srinne nrsine rnsine nsrine snrine rsnine srnine niersn inersn neirsn enirsn ienrsn einrsn niresn inresn nriesn rniesn irnesn rinesn nerisn enrisn nreisn rneisn ernisn renisn iernsn eirnsn irensn riensn erinsn reinsn niesrn inesrn neisrn enisrn iensrn einsrn nisern insern nsiern sniern isnern sinern nesirn ensirn nseirn sneirn esnirn senirn iesnrn eisnrn isenrn sienrn esinrn seinrn nirsen inrsen nrisen rnisen irnsen rinsen nisren insren nsiren sniren isnren sinren nrsien rnsien nsrien snrien rsnien srnien irsnen risnen isrnen sirnen rsinen srinen nersin enrsin nresin rnesin ernsin rensin nesrin ensrin nserin snerin esnrin senrin nrsein rnsein nsrein snrein rsnein srnein ersnin resnin esrnin sernin rsenin srenin iersnn eirsnn iresnn riesnn erisnn reisnn iesrnn eisrnn isernn siernn esirnn seirnn irsenn risenn isrenn sirenn rsienn srienn ersinn resinn esrinn serinn rseinn sreinn nnersi nnersi nenrsi ennrsi nenrsi ennrsi nnresi nnresi nrnesi rnnesi nrnesi rnnesi nernsi enrnsi nrensi rnensi ernnsi rennsi nernsi enrnsi nrensi rnensi ernnsi rennsi nnesri nnesri nensri ennsri nensri ennsri nnseri nnseri nsneri snneri nsneri snneri nesnri ensnri nsenri snenri esnnri sennri nesnri ensnri nsenri snenri esnnri sennri nnrsei nnrsei nrnsei rnnsei nrnsei rnnsei nnsrei nnsrei nsnrei snnrei nsnrei snnrei nrsnei rnsnei nsrnei snrnei rsnnei srnnei nrsnei rnsnei nsrnei snrnei rsnnei srnnei nersni enrsni nresni rnesni ernsni rensni nesrni ensrni nserni snerni esnrni senrni nrseni rnseni nsreni snreni rsneni srneni ersnni resnni esrnni sernni rsenni srenni nersni enrsni nresni rnesni ernsni rensni nesrni ensrni nserni snerni esnrni senrni nrseni rnseni nsreni snreni rsneni srneni ersnni resnni esrnni sernni rsenni srenni inersn niersn ienrsn einrsn neirsn enirsn inresn niresn irnesn rinesn nriesn rniesn iernsn eirnsn irensn riensn erinsn reinsn nerisn enrisn nreisn rneisn ernisn renisn inesrn niesrn iensrn einsrn neisrn enisrn insern nisern isnern sinern nsiern sniern iesnrn eisnrn isenrn sienrn esinrn seinrn nesirn ensirn nseirn sneirn esnirn senirn inrsen nirsen irnsen rinsen nrisen rnisen insren nisren isnren sinren nsiren sniren irsnen risnen isrnen sirnen rsinen srinen nrsien rnsien nsrien snrien rsnien srnien iersnn eirsnn iresnn riesnn erisnn reisnn iesrnn eisrnn isernn siernn esirnn seirnn irsenn risenn isrenn sirenn rsienn srienn ersinn resinn esrinn serinn rseinn sreinn nersin enrsin nresin rnesin ernsin rensin nesrin ensrin nserin snerin esnrin senrin nrsein rnsein nsrein snrein rsnein srnein ersnin resnin esrnin sernin rsenin srenin
Note: these 'words' (valid or invalid) are all the permutations of the word niners. These words are obtained by scrambling the letters in niners.