trains rtains tarins atrins ratins artins trians rtians tirans itrans ritans irtans tairns atirns tiarns itarns aitrns iatrns raitns aritns riatns iratns airtns iartns tranis rtanis tarnis atrnis ratnis artnis trnais rtnais tnrais ntrais rntais nrtais tanris atnris tnaris ntaris antris natris rantis arntis rnatis nratis anrtis nartis trinas rtinas tirnas itrnas ritnas irtnas trnias rtnias tnrias ntrias rntias nrtias tinras itnras tniras ntiras intras nitras rintas irntas rnitas nritas inrtas nirtas tainrs atinrs tianrs itanrs aitnrs iatnrs tanirs atnirs tnairs ntairs antirs natirs tinars itnars tniars ntiars intars nitars aintrs iantrs anitrs naitrs inatrs niatrs raints arints riants irants airnts iarnts ranits arnits rnaits nraits anrits narits rinats irnats rniats nriats inrats nirats ainrts ianrts anirts nairts inarts niarts traisn rtaisn tarisn atrisn ratisn artisn triasn rtiasn tirasn itrasn ritasn irtasn tairsn atirsn tiarsn itarsn aitrsn iatrsn raitsn aritsn riatsn iratsn airtsn iartsn trasin rtasin tarsin atrsin ratsin artsin trsain rtsain tsrain strain rstain srtain tasrin atsrin tsarin starin astrin satrin rastin arstin rsatin sratin asrtin sartin trisan rtisan tirsan itrsan ritsan irtsan trsian rtsian tsrian strian rstian srtian tisran itsran tsiran stiran istran sitran ristan irstan rsitan sritan isrtan sirtan taisrn atisrn tiasrn itasrn aitsrn iatsrn tasirn atsirn tsairn stairn astirn satirn tisarn itsarn tsiarn stiarn istarn sitarn aistrn iastrn asitrn saitrn isatrn siatrn raistn aristn riastn irastn airstn iarstn rasitn arsitn rsaitn sraitn asritn saritn risatn irsatn rsiatn sriatn isratn siratn aisrtn iasrtn asirtn sairtn isartn siartn transi rtansi tarnsi atrnsi ratnsi artnsi trnasi rtnasi tnrasi ntrasi rntasi nrtasi tanrsi atnrsi tnarsi ntarsi antrsi natrsi rantsi arntsi rnatsi nratsi anrtsi nartsi trasni rtasni tarsni atrsni ratsni artsni trsani rtsani tsrani strani rstani srtani tasrni atsrni tsarni starni astrni satrni rastni arstni rsatni sratni asrtni sartni trnsai rtnsai tnrsai ntrsai rntsai nrtsai trsnai rtsnai tsrnai strnai rstnai srtnai tnsrai ntsrai tsnrai stnrai nstrai sntrai rnstai nrstai rsntai srntai nsrtai snrtai tansri atnsri tnasri ntasri antsri natsri tasnri atsnri tsanri stanri astnri satnri tnsari ntsari tsnari stnari nstari sntari anstri nastri asntri santri nsatri snatri ransti arnsti rnasti nrasti anrsti narsti rasnti arsnti rsanti sranti asrnti sarnti rnsati nrsati rsnati srnati nsrati snrati ansrti nasrti asnrti sanrti nsarti snarti trinsa rtinsa tirnsa itrnsa ritnsa irtnsa trnisa rtnisa tnrisa ntrisa rntisa nrtisa tinrsa itnrsa tnirsa ntirsa intrsa nitrsa rintsa irntsa rnitsa nritsa inrtsa nirtsa trisna rtisna tirsna itrsna ritsna irtsna trsina rtsina tsrina strina rstina srtina tisrna itsrna tsirna stirna istrna sitrna ristna irstna rsitna sritna isrtna sirtna trnsia rtnsia tnrsia ntrsia rntsia nrtsia trsnia rtsnia tsrnia strnia rstnia srtnia tnsria ntsria tsnria stnria nstria sntria rnstia nrstia rsntia srntia nsrtia snrtia tinsra itnsra tnisra ntisra intsra nitsra tisnra itsnra tsinra stinra istnra sitnra tnsira ntsira tsnira stnira nstira sntira instra nistra isntra sintra nsitra snitra rinsta irnsta rnista nrista inrsta nirsta risnta irsnta rsinta srinta isrnta sirnta rnsita nrsita rsnita srnita nsrita snrita insrta nisrta isnrta sinrta nsirta snirta tainsr atinsr tiansr itansr aitnsr iatnsr tanisr atnisr tnaisr ntaisr antisr natisr tinasr itnasr tniasr ntiasr intasr nitasr aintsr iantsr anitsr naitsr inatsr niatsr taisnr atisnr tiasnr itasnr aitsnr iatsnr tasinr atsinr tsainr stainr astinr satinr tisanr itsanr tsianr stianr istanr sitanr aistnr iastnr asitnr saitnr isatnr siatnr tansir atnsir tnasir ntasir antsir natsir tasnir atsnir tsanir stanir astnir satnir tnsair ntsair tsnair stnair nstair sntair anstir nastir asntir santir nsatir snatir tinsar itnsar tnisar ntisar intsar nitsar tisnar itsnar tsinar stinar istnar sitnar tnsiar ntsiar tsniar stniar nstiar sntiar instar nistar isntar sintar nsitar snitar ainstr ianstr anistr naistr inastr niastr aisntr iasntr asintr saintr isantr siantr ansitr nasitr asnitr sanitr nsaitr snaitr insatr nisatr isnatr sinatr nsiatr sniatr rainst arinst rianst iranst airnst iarnst ranist arnist rnaist nraist anrist narist rinast irnast rniast nriast inrast nirast ainrst ianrst anirst nairst inarst niarst raisnt arisnt riasnt irasnt airsnt iarsnt rasint arsint rsaint sraint asrint sarint risant irsant rsiant sriant isrant sirant aisrnt iasrnt asirnt sairnt isarnt siarnt ransit arnsit rnasit nrasit anrsit narsit rasnit arsnit rsanit sranit asrnit sarnit rnsait nrsait rsnait srnait nsrait snrait ansrit nasrit asnrit sanrit nsarit snarit rinsat irnsat rnisat nrisat inrsat nirsat risnat irsnat rsinat srinat isrnat sirnat rnsiat nrsiat rsniat srniat nsriat snriat insrat nisrat isnrat sinrat nsirat snirat ainsrt iansrt anisrt naisrt inasrt niasrt aisnrt iasnrt asinrt sainrt isanrt sianrt ansirt nasirt asnirt sanirt nsairt snairt insart nisart isnart sinart nsiart sniart
Note: these 'words' (valid or invalid) are all the permutations of the word trains. These words are obtained by scrambling the letters in trains.