spiral psiral sipral ispral pisral ipsral sprial psrial srpial rspial prsial rpsial sirpal isrpal sripal rsipal irspal rispal pirsal iprsal prisal rpisal irpsal ripsal spiarl psiarl siparl isparl pisarl ipsarl spairl psairl sapirl aspirl pasirl apsirl siaprl isaprl saiprl asiprl iasprl aisprl piasrl ipasrl paisrl apisrl iapsrl aipsrl sprail psrail srpail rspail prsail rpsail sparil psaril sapril aspril pasril apsril srapil rsapil sarpil asrpil raspil arspil prasil rpasil parsil aprsil rapsil arpsil sirapl israpl sriapl rsiapl irsapl risapl siarpl isarpl sairpl asirpl iasrpl aisrpl sraipl rsaipl saripl asripl rasipl arsipl iraspl riaspl iarspl airspl raispl arispl pirasl iprasl priasl rpiasl irpasl ripasl piarsl iparsl pairsl apirsl iaprsl aiprsl praisl rpaisl parisl aprisl rapisl arpisl irapsl riapsl iarpsl airpsl raipsl aripsl spirla psirla siprla isprla pisrla ipsrla sprila psrila srpila rspila prsila rpsila sirpla isrpla sripla rsipla irspla rispla pirsla iprsla prisla rpisla irpsla ripsla spilra psilra siplra isplra pislra ipslra splira pslira slpira lspira plsira lpsira silpra islpra slipra lsipra ilspra lispra pilsra iplsra plisra lpisra ilpsra lipsra sprlia psrlia srplia rsplia prslia rpslia splria pslria slpria lspria plsria lpsria srlpia rslpia slrpia lsrpia rlspia lrspia prlsia rplsia plrsia lprsia rlpsia lrpsia sirlpa isrlpa srilpa rsilpa irslpa rislpa silrpa islrpa slirpa lsirpa ilsrpa lisrpa srlipa rslipa slripa lsripa rlsipa lrsipa irlspa rilspa ilrspa lirspa rlispa lrispa pirlsa iprlsa prilsa rpilsa irplsa riplsa pilrsa iplrsa plirsa lpirsa ilprsa liprsa prlisa rplisa plrisa lprisa rlpisa lrpisa irlpsa rilpsa ilrpsa lirpsa rlipsa lripsa spialr psialr sipalr ispalr pisalr ipsalr spailr psailr sapilr aspilr pasilr apsilr siaplr isaplr saiplr asiplr iasplr aisplr piaslr ipaslr paislr apislr iapslr aipslr spilar psilar siplar isplar pislar ipslar spliar psliar slpiar lspiar plsiar lpsiar silpar islpar slipar lsipar ilspar lispar pilsar iplsar plisar lpisar ilpsar lipsar spalir psalir saplir asplir paslir apslir splair pslair slpair lspair plsair lpsair salpir aslpir slapir lsapir alspir laspir palsir aplsir plasir lpasir alpsir lapsir sialpr isalpr sailpr asilpr iaslpr aislpr silapr islapr sliapr lsiapr ilsapr lisapr salipr aslipr slaipr lsaipr alsipr lasipr ialspr ailspr ilaspr liaspr alispr laispr pialsr ipalsr pailsr apilsr iaplsr aiplsr pilasr iplasr pliasr lpiasr ilpasr lipasr palisr aplisr plaisr lpaisr alpisr lapisr ialpsr ailpsr ilapsr liapsr alipsr laipsr sprali psrali srpali rspali prsali rpsali sparli psarli saprli asprli pasrli apsrli srapli rsapli sarpli asrpli raspli arspli prasli rpasli parsli aprsli rapsli arpsli sprlai psrlai srplai rsplai prslai rpslai splrai pslrai slprai lsprai plsrai lpsrai srlpai rslpai slrpai lsrpai rlspai lrspai prlsai rplsai plrsai lprsai rlpsai lrpsai spalri psalri saplri asplri paslri apslri splari pslari slpari lspari plsari lpsari salpri aslpri slapri lsapri alspri laspri palsri aplsri plasri lpasri alpsri lapsri sralpi rsalpi sarlpi asrlpi raslpi arslpi srlapi rslapi slrapi lsrapi rlsapi lrsapi salrpi aslrpi slarpi lsarpi alsrpi lasrpi ralspi arlspi rlaspi lraspi alrspi larspi pralsi rpalsi parlsi aprlsi raplsi arplsi prlasi rplasi plrasi lprasi rlpasi lrpasi palrsi aplrsi plarsi lparsi alprsi laprsi ralpsi arlpsi rlapsi lrapsi alrpsi larpsi siralp isralp srialp rsialp irsalp risalp siarlp isarlp sairlp asirlp iasrlp aisrlp srailp rsailp sarilp asrilp rasilp arsilp iraslp riaslp iarslp airslp raislp arislp sirlap isrlap srilap rsilap irslap rislap silrap islrap slirap lsirap ilsrap lisrap srliap rsliap slriap lsriap rlsiap lrsiap irlsap rilsap ilrsap lirsap rlisap lrisap sialrp isalrp sailrp asilrp iaslrp aislrp silarp islarp sliarp lsiarp ilsarp lisarp salirp aslirp slairp lsairp alsirp lasirp ialsrp ailsrp ilasrp liasrp alisrp laisrp sralip rsalip sarlip asrlip raslip arslip srlaip rslaip slraip lsraip rlsaip lrsaip salrip aslrip slarip lsarip alsrip lasrip ralsip arlsip rlasip lrasip alrsip larsip iralsp rialsp iarlsp airlsp railsp arilsp irlasp rilasp ilrasp lirasp rliasp lriasp ialrsp ailrsp ilarsp liarsp alirsp lairsp ralisp arlisp rlaisp lraisp alrisp larisp pirals iprals prials rpials irpals ripals piarls iparls pairls apirls iaprls aiprls prails rpails parils aprils rapils arpils irapls riapls iarpls airpls raipls aripls pirlas iprlas prilas rpilas irplas riplas pilras iplras pliras lpiras ilpras lipras prlias rplias plrias lprias rlpias lrpias irlpas rilpas ilrpas lirpas rlipas lripas pialrs ipalrs pailrs apilrs iaplrs aiplrs pilars iplars pliars lpiars ilpars lipars palirs aplirs plairs lpairs alpirs lapirs ialprs ailprs ilaprs liaprs aliprs laiprs pralis rpalis parlis aprlis raplis arplis prlais rplais plrais lprais rlpais lrpais palris aplris plaris lparis alpris lapris ralpis arlpis rlapis lrapis alrpis larpis iralps rialps iarlps airlps railps arilps irlaps rilaps ilraps liraps rliaps lriaps ialrps ailrps ilarps liarps alirps lairps ralips arlips rlaips lraips alrips larips
Note: these 'words' (valid or invalid) are all the permutations of the word spiral. These words are obtained by scrambling the letters in spiral.