slipup lsipup silpup islpup lispup ilspup slpiup lspiup spliup psliup lpsiup plsiup siplup isplup spilup psilup ipslup pislup lipsup ilpsup lpisup plisup iplsup pilsup sliupp lsiupp silupp islupp lisupp ilsupp sluipp lsuipp sulipp uslipp lusipp ulsipp siulpp isulpp suilpp usilpp iuslpp uislpp liuspp iluspp luispp ulispp iulspp uilspp slpuip lspuip spluip psluip lpsuip plsuip slupip lsupip sulpip uslpip luspip ulspip spulip psulip suplip usplip puslip upslip lpusip plusip lupsip ulpsip pulsip uplsip sipulp ispulp spiulp psiulp ipsulp pisulp siuplp isuplp suiplp usiplp iusplp uisplp spuilp psuilp supilp uspilp pusilp upsilp ipuslp piuslp iupslp uipslp puislp upislp lipusp ilpusp lpiusp pliusp iplusp pilusp liupsp ilupsp luipsp ulipsp iulpsp uilpsp lpuisp pluisp lupisp ulpisp pulisp uplisp ipulsp piulsp iuplsp uiplsp puilsp upilsp slippu lsippu silppu islppu lisppu ilsppu slpipu lspipu splipu pslipu lpsipu plsipu siplpu isplpu spilpu psilpu ipslpu pislpu lipspu ilpspu lpispu plispu iplspu pilspu slippu lsippu silppu islppu lisppu ilsppu slpipu lspipu splipu pslipu lpsipu plsipu siplpu isplpu spilpu psilpu ipslpu pislpu lipspu ilpspu lpispu plispu iplspu pilspu slppiu lsppiu splpiu pslpiu lpspiu plspiu slppiu lsppiu splpiu pslpiu lpspiu plspiu sppliu pspliu sppliu pspliu ppsliu ppsliu lppsiu plpsiu lppsiu plpsiu pplsiu pplsiu sipplu ispplu spiplu psiplu ipsplu pisplu sipplu ispplu spiplu psiplu ipsplu pisplu sppilu pspilu sppilu pspilu ppsilu ppsilu ippslu pipslu ippslu pipslu ppislu ppislu lippsu ilppsu lpipsu plipsu iplpsu pilpsu lippsu ilppsu lpipsu plipsu iplpsu pilpsu lppisu plpisu lppisu plpisu pplisu pplisu ipplsu piplsu ipplsu piplsu ppilsu ppilsu sliupp lsiupp silupp islupp lisupp ilsupp sluipp lsuipp sulipp uslipp lusipp ulsipp siulpp isulpp suilpp usilpp iuslpp uislpp liuspp iluspp luispp ulispp iulspp uilspp slipup lsipup silpup islpup lispup ilspup slpiup lspiup spliup psliup lpsiup plsiup siplup isplup spilup psilup ipslup pislup lipsup ilpsup lpisup plisup iplsup pilsup slupip lsupip sulpip uslpip luspip ulspip slpuip lspuip spluip psluip lpsuip plsuip suplip usplip spulip psulip upslip puslip lupsip ulpsip lpusip plusip uplsip pulsip siuplp isuplp suiplp usiplp iusplp uisplp sipulp ispulp spiulp psiulp ipsulp pisulp supilp uspilp spuilp psuilp upsilp pusilp iupslp uipslp ipuslp piuslp upislp puislp liupsp ilupsp luipsp ulipsp iulpsp uilpsp lipusp ilpusp lpiusp pliusp iplusp pilusp lupisp ulpisp lpuisp pluisp uplisp pulisp iuplsp uiplsp ipulsp piulsp upilsp puilsp slpupi lspupi splupi pslupi lpsupi plsupi sluppi lsuppi sulppi uslppi lusppi ulsppi spulpi psulpi suplpi usplpi puslpi upslpi lpuspi pluspi lupspi ulpspi pulspi uplspi slppui lsppui splpui pslpui lpspui plspui slppui lsppui splpui pslpui lpspui plspui spplui psplui spplui psplui ppslui ppslui lppsui plpsui lppsui plpsui pplsui pplsui sluppi lsuppi sulppi uslppi lusppi ulsppi slpupi lspupi splupi pslupi lpsupi plsupi suplpi usplpi spulpi psulpi upslpi puslpi lupspi ulpspi lpuspi pluspi uplspi pulspi spupli psupli suppli usppli puspli upspli sppuli pspuli sppuli pspuli ppsuli ppsuli suppli usppli spupli psupli upspli puspli pupsli uppsli ppusli ppusli uppsli pupsli lpupsi plupsi luppsi ulppsi pulpsi uplpsi lppusi plpusi lppusi plpusi pplusi pplusi luppsi ulppsi lpupsi plupsi uplpsi pulpsi puplsi upplsi ppulsi ppulsi upplsi puplsi sipupl ispupl spiupl psiupl ipsupl pisupl siuppl isuppl suippl usippl iusppl uisppl spuipl psuipl supipl uspipl pusipl upsipl ipuspl piuspl iupspl uipspl puispl upispl sippul isppul spipul psipul ipspul pispul sippul isppul spipul psipul ipspul pispul sppiul pspiul sppiul pspiul ppsiul ppsiul ippsul pipsul ippsul pipsul ppisul ppisul siuppl isuppl suippl usippl iusppl uisppl sipupl ispupl spiupl psiupl ipsupl pisupl supipl uspipl spuipl psuipl upsipl pusipl iupspl uipspl ipuspl piuspl upispl puispl spupil psupil suppil usppil puspil upspil sppuil pspuil sppuil pspuil ppsuil ppsuil suppil usppil spupil psupil upspil puspil pupsil uppsil ppusil ppusil uppsil pupsil ipupsl piupsl iuppsl uippsl puipsl upipsl ippusl pipusl ippusl pipusl ppiusl ppiusl iuppsl uippsl ipupsl piupsl upipsl puipsl pupisl uppisl ppuisl ppuisl uppisl pupisl lipups ilpups lpiups pliups iplups pilups liupps ilupps luipps ulipps iulpps uilpps lpuips pluips lupips ulpips pulips uplips ipulps piulps iuplps uiplps puilps upilps lippus ilppus lpipus plipus iplpus pilpus lippus ilppus lpipus plipus iplpus pilpus lppius plpius lppius plpius pplius pplius ipplus piplus ipplus piplus ppilus ppilus liupps ilupps luipps ulipps iulpps uilpps lipups ilpups lpiups pliups iplups pilups lupips ulpips lpuips pluips uplips pulips iuplps uiplps ipulps piulps upilps puilps lpupis plupis luppis ulppis pulpis uplpis lppuis plpuis lppuis plpuis ppluis ppluis luppis ulppis lpupis plupis uplpis pulpis puplis upplis ppulis ppulis upplis puplis ipupls piupls iuppls uippls puipls upipls ippuls pipuls ippuls pipuls ppiuls ppiuls iuppls uippls ipupls piupls upipls puipls pupils uppils ppuils ppuils uppils pupils
Note: these 'words' (valid or invalid) are all the permutations of the word slipup. These words are obtained by scrambling the letters in slipup.