castor acstor csator scator asctor sactor catsor actsor ctasor tcasor atcsor tacsor cstaor sctaor ctsaor tcsaor stcaor tscaor astcor satcor atscor tascor stacor tsacor casotr acsotr csaotr scaotr ascotr sacotr caostr acostr coastr ocastr aocstr oacstr csoatr scoatr cosatr ocsatr socatr oscatr asoctr saoctr aosctr oasctr soactr osactr catosr actosr ctaosr tcaosr atcosr tacosr caotsr acotsr coatsr ocatsr aoctsr oactsr ctoasr tcoasr cotasr octasr tocasr otcasr atocsr taocsr aotcsr oatcsr toacsr otacsr cstoar sctoar ctsoar tcsoar stcoar tscoar csotar scotar costar ocstar soctar osctar ctosar tcosar cotsar octsar tocsar otcsar stocar tsocar sotcar ostcar toscar otscar astocr satocr atsocr tasocr staocr tsaocr asotcr saotcr aostcr oastcr soatcr osatcr atoscr taoscr aotscr oatscr toascr otascr stoacr tsoacr sotacr ostacr tosacr otsacr castro acstro csatro scatro asctro sactro catsro actsro ctasro tcasro atcsro tacsro cstaro sctaro ctsaro tcsaro stcaro tscaro astcro satcro atscro tascro stacro tsacro casrto acsrto csarto scarto ascrto sacrto carsto acrsto crasto rcasto arcsto racsto csrato scrato crsato rcsato srcato rscato asrcto sarcto arscto rascto sracto rsacto catrso actrso ctarso tcarso atcrso tacrso cartso acrtso cratso rcatso arctso ractso ctraso tcraso crtaso rctaso trcaso rtcaso atrcso tarcso artcso ratcso tracso rtacso cstrao sctrao ctsrao tcsrao stcrao tscrao csrtao scrtao crstao rcstao srctao rsctao ctrsao tcrsao crtsao rctsao trcsao rtcsao strcao tsrcao srtcao rstcao trscao rtscao astrco satrco atsrco tasrco starco tsarco asrtco sartco arstco rastco sratco rsatco atrsco tarsco artsco ratsco trasco rtasco straco tsraco srtaco rstaco trsaco rtsaco casort acsort csaort scaort ascort sacort caosrt acosrt coasrt ocasrt aocsrt oacsrt csoart scoart cosart ocsart socart oscart asocrt saocrt aoscrt oascrt soacrt osacrt casrot acsrot csarot scarot ascrot sacrot carsot acrsot crasot rcasot arcsot racsot csraot scraot crsaot rcsaot srcaot rscaot asrcot sarcot arscot rascot sracot rsacot caorst acorst coarst ocarst aocrst oacrst carost acrost craost rcaost arcost racost corast ocrast croast rcoast orcast rocast aorcst oarcst arocst raocst oracst roacst csorat scorat cosrat ocsrat socrat oscrat csroat scroat crsoat rcsoat srcoat rscoat corsat ocrsat crosat rcosat orcsat rocsat sorcat osrcat srocat rsocat orscat roscat asorct saorct aosrct oasrct soarct osarct asroct saroct arsoct rasoct sraoct rsaoct aorsct oarsct arosct raosct orasct roasct soract osract sroact rsoact orsact rosact cators actors ctaors tcaors atcors tacors caotrs acotrs coatrs ocatrs aoctrs oactrs ctoars tcoars cotars octars tocars otcars atocrs taocrs aotcrs oatcrs toacrs otacrs catros actros ctaros tcaros atcros tacros cartos acrtos cratos rcatos arctos ractos ctraos tcraos crtaos rctaos trcaos rtcaos atrcos tarcos artcos ratcos tracos rtacos caorts acorts coarts ocarts aocrts oacrts carots acrots craots rcaots arcots racots corats ocrats croats rcoats orcats rocats aorcts oarcts arocts raocts oracts roacts ctoras tcoras cotras octras tocras otcras ctroas tcroas crtoas rctoas trcoas rtcoas cortas ocrtas crotas rcotas orctas roctas torcas otrcas trocas rtocas ortcas rotcas atorcs taorcs aotrcs oatrcs toarcs otarcs atrocs tarocs artocs ratocs traocs rtaocs aortcs oartcs arotcs raotcs oratcs roatcs toracs otracs troacs rtoacs ortacs rotacs cstora sctora ctsora tcsora stcora tscora csotra scotra costra ocstra soctra osctra ctosra tcosra cotsra octsra tocsra otcsra stocra tsocra sotcra ostcra toscra otscra cstroa sctroa ctsroa tcsroa stcroa tscroa csrtoa scrtoa crstoa rcstoa srctoa rsctoa ctrsoa tcrsoa crtsoa rctsoa trcsoa rtcsoa strcoa tsrcoa srtcoa rstcoa trscoa rtscoa csorta scorta cosrta ocsrta socrta oscrta csrota scrota crsota rcsota srcota rscota corsta ocrsta crosta rcosta orcsta rocsta sorcta osrcta srocta rsocta orscta roscta ctorsa tcorsa cotrsa octrsa tocrsa otcrsa ctrosa tcrosa crtosa rctosa trcosa rtcosa cortsa ocrtsa crotsa rcotsa orctsa roctsa torcsa otrcsa trocsa rtocsa ortcsa rotcsa storca tsorca sotrca ostrca tosrca otsrca stroca tsroca srtoca rstoca trsoca rtsoca sortca osrtca srotca rsotca orstca rostca torsca otrsca trosca rtosca ortsca rotsca astorc satorc atsorc tasorc staorc tsaorc asotrc saotrc aostrc oastrc soatrc osatrc atosrc taosrc aotsrc oatsrc toasrc otasrc stoarc tsoarc sotarc ostarc tosarc otsarc astroc satroc atsroc tasroc staroc tsaroc asrtoc sartoc arstoc rastoc sratoc rsatoc atrsoc tarsoc artsoc ratsoc trasoc rtasoc straoc tsraoc srtaoc rstaoc trsaoc rtsaoc asortc saortc aosrtc oasrtc soartc osartc asrotc sarotc arsotc rasotc sraotc rsaotc aorstc oarstc arostc raostc orastc roastc soratc osratc sroatc rsoatc orsatc rosatc atorsc taorsc aotrsc oatrsc toarsc otarsc atrosc tarosc artosc ratosc traosc rtaosc aortsc oartsc arotsc raotsc oratsc roatsc torasc otrasc troasc rtoasc ortasc rotasc storac tsorac sotrac ostrac tosrac otsrac stroac tsroac srtoac rstoac trsoac rtsoac sortac osrtac srotac rsotac orstac rostac torsac otrsac trosac rtosac ortsac rotsac
Note: these 'words' (valid or invalid) are all the permutations of the word castor. These words are obtained by scrambling the letters in castor.