spines psines sipnes ispnes pisnes ipsnes spnies psnies snpies nspies pnsies npsies sinpes isnpes snipes nsipes inspes nispes pinses ipnses pnises npises inpses nipses spiens psiens sipens ispens pisens ipsens speins pseins sepins espins pesins epsins siepns isepns seipns esipns iespns eispns piesns ipesns peisns episns iepsns eipsns spneis psneis snpeis nspeis pnseis npseis spenis psenis sepnis espnis pesnis epsnis snepis nsepis senpis esnpis nespis enspis pnesis npesis pensis epnsis nepsis enpsis sineps isneps snieps nsieps inseps niseps sienps isenps seinps esinps iesnps eisnps sneips nseips senips esnips nesips ensips inesps niesps iensps einsps neisps enisps piness ipness pniess npiess inpess nipess pienss ipenss peinss epinss iepnss eipnss pneiss npeiss peniss epniss nepiss enpiss inepss niepss ienpss einpss neipss enipss spinse psinse sipnse ispnse pisnse ipsnse spnise psnise snpise nspise pnsise npsise sinpse isnpse snipse nsipse inspse nispse pinsse ipnsse pnisse npisse inpsse nipsse spisne psisne sipsne ispsne pissne ipssne spsine pssine sspine sspine pssine spsine sispne isspne ssipne ssipne isspne sispne pissne ipssne psisne spisne ispsne sipsne spnsie psnsie snpsie nspsie pnssie npssie spsnie pssnie sspnie sspnie pssnie spsnie snspie nsspie ssnpie ssnpie nsspie snspie pnssie npssie psnsie spnsie nspsie snpsie sinspe isnspe snispe nsispe insspe nisspe sisnpe issnpe ssinpe ssinpe issnpe sisnpe snsipe nssipe ssnipe ssnipe nssipe snsipe insspe nisspe isnspe sinspe nsispe snispe pinsse ipnsse pnisse npisse inpsse nipsse pisnse ipsnse psinse spinse ispnse sipnse pnsise npsise psnise spnise nspise snpise inspse nispse isnpse sinpse nsipse snipse spiesn psiesn sipesn ispesn pisesn ipsesn speisn pseisn sepisn espisn pesisn epsisn siepsn isepsn seipsn esipsn iespsn eispsn piessn ipessn peissn epissn iepssn eipssn spisen psisen sipsen ispsen pissen ipssen spsien pssien sspien sspien pssien spsien sispen isspen ssipen ssipen isspen sispen pissen ipssen psisen spisen ispsen sipsen spesin psesin sepsin espsin pessin epssin spsein pssein sspein sspein pssein spsein sespin esspin ssepin ssepin esspin sespin pessin epssin psesin spesin espsin sepsin siespn isespn seispn esispn iesspn eisspn sisepn issepn ssiepn ssiepn issepn sisepn sesipn essipn sseipn sseipn essipn sesipn iesspn eisspn isespn siespn esispn seispn piessn ipessn peissn epissn iepssn eipssn pisesn ipsesn psiesn spiesn ispesn sipesn pesisn epsisn pseisn speisn espisn sepisn iespsn eispsn isepsn siepsn esipsn seipsn spnesi psnesi snpesi nspesi pnsesi npsesi spensi psensi sepnsi espnsi pesnsi epsnsi snepsi nsepsi senpsi esnpsi nespsi enspsi pnessi npessi penssi epnssi nepssi enpssi spnsei psnsei snpsei nspsei pnssei npssei spsnei pssnei sspnei sspnei pssnei spsnei snspei nsspei ssnpei ssnpei nsspei snspei pnssei npssei psnsei spnsei nspsei snpsei spesni psesni sepsni espsni pessni epssni spseni psseni sspeni sspeni psseni spseni sespni esspni ssepni ssepni esspni sespni pessni epssni psesni spesni espsni sepsni snespi nsespi senspi esnspi nesspi ensspi snsepi nssepi ssnepi ssnepi nssepi snsepi sesnpi essnpi ssenpi ssenpi essnpi sesnpi nesspi ensspi nsespi snespi esnspi senspi pnessi npessi penssi epnssi nepssi enpssi pnsesi npsesi psnesi spnesi nspesi snpesi pesnsi epsnsi psensi spensi espnsi sepnsi nespsi enspsi nsepsi snepsi esnpsi senpsi sinesp isnesp sniesp nsiesp insesp nisesp siensp isensp seinsp esinsp iesnsp eisnsp sneisp nseisp senisp esnisp nesisp ensisp inessp niessp ienssp einssp neissp enissp sinsep isnsep snisep nsisep inssep nissep sisnep issnep ssinep ssinep issnep sisnep snsiep nssiep ssniep ssniep nssiep snsiep inssep nissep isnsep sinsep nsisep snisep siesnp isesnp seisnp esisnp iessnp eissnp sisenp issenp ssienp ssienp issenp sisenp sesinp essinp sseinp sseinp essinp sesinp iessnp eissnp isesnp siesnp esisnp seisnp snesip nsesip sensip esnsip nessip enssip snseip nsseip ssneip ssneip nsseip snseip sesnip essnip ssenip ssenip essnip sesnip nessip enssip nsesip snesip esnsip sensip inessp niessp ienssp einssp neissp enissp insesp nisesp isnesp sinesp nsiesp sniesp iesnsp eisnsp isensp siensp esinsp seinsp nesisp ensisp nseisp sneisp esnisp senisp piness ipness pniess npiess inpess nipess pienss ipenss peinss epinss iepnss eipnss pneiss npeiss peniss epniss nepiss enpiss inepss niepss ienpss einpss neipss enipss pinses ipnses pnises npises inpses nipses pisnes ipsnes psines spines ispnes sipnes pnsies npsies psnies spnies nspies snpies inspes nispes isnpes sinpes nsipes snipes piesns ipesns peisns episns iepsns eipsns pisens ipsens psiens spiens ispens sipens pesins epsins pseins speins espins sepins iespns eispns isepns siepns esipns seipns pnesis npesis pensis epnsis nepsis enpsis pnseis npseis psneis spneis nspeis snpeis pesnis epsnis psenis spenis espnis sepnis nespis enspis nsepis snepis esnpis senpis inesps niesps iensps einsps neisps enisps inseps niseps isneps sineps nsieps snieps iesnps eisnps isenps sienps esinps seinps nesips ensips nseips sneips esnips senips
Note: these 'words' (valid or invalid) are all the permutations of the word spines. These words are obtained by scrambling the letters in spines.