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