upcoil pucoil ucpoil cupoil pcuoil cpuoil upocil puocil uopcil oupcil poucil opucil ucopil cuopil uocpil oucpil coupil ocupil pcouil cpouil pocuil opcuil copuil ocpuil upciol puciol ucpiol cupiol pcuiol cpuiol upicol puicol uipcol iupcol piucol ipucol ucipol cuipol uicpol iucpol ciupol icupol pciuol cpiuol picuol ipcuol cipuol icpuol upoicl puoicl uopicl oupicl pouicl opuicl upiocl puiocl uipocl iupocl piuocl ipuocl uoipcl ouipcl uiopcl iuopcl oiupcl ioupcl poiucl opiucl pioucl ipoucl oipucl iopucl ucoipl cuoipl uocipl oucipl couipl ocuipl uciopl cuiopl uicopl iucopl ciuopl icuopl uoicpl ouicpl uiocpl iuocpl oiucpl ioucpl coiupl ociupl cioupl icoupl oicupl iocupl pcoiul cpoiul pociul opciul copiul ocpiul pcioul cpioul picoul ipcoul cipoul icpoul poicul opicul piocul ipocul oipcul iopcul coipul ocipul ciopul icopul oicpul iocpul upcoli pucoli ucpoli cupoli pcuoli cpuoli upocli puocli uopcli oupcli poucli opucli ucopli cuopli uocpli oucpli coupli ocupli pcouli cpouli poculi opculi copuli ocpuli upcloi pucloi ucploi cuploi pculoi cpuloi uplcoi pulcoi ulpcoi lupcoi plucoi lpucoi uclpoi culpoi ulcpoi lucpoi clupoi lcupoi pcluoi cpluoi plcuoi lpcuoi clpuoi lcpuoi upolci puolci uoplci ouplci poulci opulci uploci puloci ulpoci lupoci pluoci lpuoci uolpci oulpci ulopci luopci olupci loupci poluci opluci plouci lpouci olpuci lopuci ucolpi cuolpi uoclpi ouclpi coulpi oculpi uclopi culopi ulcopi lucopi cluopi lcuopi uolcpi oulcpi ulocpi luocpi olucpi loucpi colupi oclupi cloupi lcoupi olcupi locupi pcolui cpolui poclui opclui coplui ocplui pcloui cploui plcoui lpcoui clpoui lcpoui polcui oplcui plocui lpocui olpcui lopcui colpui oclpui clopui lcopui olcpui locpui upcilo pucilo ucpilo cupilo pcuilo cpuilo upiclo puiclo uipclo iupclo piuclo ipuclo uciplo cuiplo uicplo iucplo ciuplo icuplo pciulo cpiulo piculo ipculo cipulo icpulo upclio puclio ucplio cuplio pculio cpulio uplcio pulcio ulpcio lupcio plucio lpucio uclpio culpio ulcpio lucpio clupio lcupio pcluio cpluio plcuio lpcuio clpuio lcpuio upilco puilco uiplco iuplco piulco ipulco uplico pulico ulpico lupico pluico lpuico uilpco iulpco ulipco luipco ilupco liupco piluco ipluco pliuco lpiuco ilpuco lipuco ucilpo cuilpo uiclpo iuclpo ciulpo iculpo uclipo culipo ulcipo lucipo cluipo lcuipo uilcpo iulcpo ulicpo luicpo ilucpo liucpo cilupo iclupo cliupo lciupo ilcupo licupo pciluo cpiluo picluo ipcluo cipluo icpluo pcliuo cpliuo plciuo lpciuo clpiuo lcpiuo pilcuo iplcuo plicuo lpicuo ilpcuo lipcuo cilpuo iclpuo clipuo lcipuo ilcpuo licpuo upoilc puoilc uopilc oupilc pouilc opuilc upiolc puiolc uipolc iupolc piuolc ipuolc uoiplc ouiplc uioplc iuoplc oiuplc iouplc poiulc opiulc pioulc ipoulc oipulc iopulc upolic puolic uoplic ouplic poulic opulic uploic puloic ulpoic lupoic pluoic lpuoic uolpic oulpic ulopic luopic olupic loupic poluic opluic plouic lpouic olpuic lopuic upiloc puiloc uiploc iuploc piuloc ipuloc uplioc pulioc ulpioc lupioc pluioc lpuioc uilpoc iulpoc ulipoc luipoc ilupoc liupoc piluoc ipluoc pliuoc lpiuoc ilpuoc lipuoc uoilpc ouilpc uiolpc iuolpc oiulpc ioulpc uolipc oulipc uloipc luoipc oluipc louipc uilopc iulopc uliopc luiopc iluopc liuopc oilupc iolupc oliupc loiupc iloupc lioupc poiluc opiluc pioluc ipoluc oipluc iopluc poliuc opliuc ploiuc lpoiuc olpiuc lopiuc pilouc iplouc pliouc lpiouc ilpouc lipouc oilpuc iolpuc olipuc loipuc ilopuc liopuc ucoilp cuoilp uocilp oucilp couilp ocuilp uciolp cuiolp uicolp iucolp ciuolp icuolp uoiclp ouiclp uioclp iuoclp oiuclp iouclp coiulp ociulp cioulp icoulp oiculp ioculp ucolip cuolip uoclip ouclip coulip oculip ucloip culoip ulcoip lucoip cluoip lcuoip uolcip oulcip ulocip luocip olucip loucip coluip ocluip clouip lcouip olcuip locuip ucilop cuilop uiclop iuclop ciulop iculop ucliop culiop ulciop luciop cluiop lcuiop uilcop iulcop ulicop luicop ilucop liucop ciluop icluop cliuop lciuop ilcuop licuop uoilcp ouilcp uiolcp iuolcp oiulcp ioulcp uolicp oulicp uloicp luoicp oluicp louicp uilocp iulocp uliocp luiocp iluocp liuocp oilucp iolucp oliucp loiucp iloucp lioucp coilup ocilup ciolup icolup oiclup ioclup coliup ocliup cloiup lcoiup olciup lociup ciloup icloup clioup lcioup ilcoup licoup oilcup iolcup olicup loicup ilocup liocup pcoilu cpoilu pocilu opcilu copilu ocpilu pciolu cpiolu picolu ipcolu cipolu icpolu poiclu opiclu pioclu ipoclu oipclu iopclu coiplu ociplu cioplu icoplu oicplu iocplu pcoliu cpoliu pocliu opcliu copliu ocpliu pcloiu cploiu plcoiu lpcoiu clpoiu lcpoiu polciu oplciu plociu lpociu olpciu lopciu colpiu oclpiu clopiu lcopiu olcpiu locpiu pcilou cpilou piclou ipclou ciplou icplou pcliou cpliou plciou lpciou clpiou lcpiou pilcou iplcou plicou lpicou ilpcou lipcou cilpou iclpou clipou lcipou ilcpou licpou poilcu opilcu piolcu ipolcu oiplcu ioplcu policu oplicu ploicu lpoicu olpicu lopicu pilocu iplocu pliocu lpiocu ilpocu lipocu oilpcu iolpcu olipcu loipcu ilopcu liopcu coilpu ocilpu ciolpu icolpu oiclpu ioclpu colipu oclipu cloipu lcoipu olcipu locipu cilopu iclopu cliopu lciopu ilcopu licopu oilcpu iolcpu olicpu loicpu ilocpu liocpu
Note: these 'words' (valid or invalid) are all the permutations of the word upcoil. These words are obtained by scrambling the letters in upcoil.