oppugn popugn oppugn popugn ppougn ppougn opupgn poupgn ouppgn uoppgn puopgn upopgn opupgn poupgn ouppgn uoppgn puopgn upopgn ppuogn ppuogn pupogn uppogn pupogn uppogn oppgun popgun oppgun popgun ppogun ppogun opgpun pogpun ogppun goppun pgopun gpopun opgpun pogpun ogppun goppun pgopun gpopun ppgoun ppgoun pgpoun gppoun pgpoun gppoun opugpn pougpn oupgpn uopgpn puogpn upogpn opgupn pogupn ogpupn gopupn pgoupn gpoupn ougppn uogppn oguppn gouppn ugoppn guoppn pugopn upgopn pguopn gpuopn ugpopn gupopn opugpn pougpn oupgpn uopgpn puogpn upogpn opgupn pogupn ogpupn gopupn pgoupn gpoupn ougppn uogppn oguppn gouppn ugoppn guoppn pugopn upgopn pguopn gpuopn ugpopn gupopn ppugon ppugon pupgon uppgon pupgon uppgon ppguon ppguon pgpuon gppuon pgpuon gppuon pugpon upgpon pgupon gpupon ugppon guppon pugpon upgpon pgupon gpupon ugppon guppon oppung popung oppung popung ppoung ppoung opupng poupng ouppng uoppng puopng upopng opupng poupng ouppng uoppng puopng upopng ppuong ppuong pupong uppong pupong uppong oppnug popnug oppnug popnug pponug pponug opnpug ponpug onppug noppug pnopug npopug opnpug ponpug onppug noppug pnopug npopug ppnoug ppnoug pnpoug nppoug pnpoug nppoug opunpg pounpg oupnpg uopnpg puonpg uponpg opnupg ponupg onpupg nopupg pnoupg npoupg ounppg uonppg onuppg nouppg unoppg nuoppg punopg upnopg pnuopg npuopg unpopg nupopg opunpg pounpg oupnpg uopnpg puonpg uponpg opnupg ponupg onpupg nopupg pnoupg npoupg ounppg uonppg onuppg nouppg unoppg nuoppg punopg upnopg pnuopg npuopg unpopg nupopg ppunog ppunog pupnog uppnog pupnog uppnog ppnuog ppnuog pnpuog nppuog pnpuog nppuog punpog upnpog pnupog npupog unppog nuppog punpog upnpog pnupog npupog unppog nuppog oppgnu popgnu oppgnu popgnu ppognu ppognu opgpnu pogpnu ogppnu goppnu pgopnu gpopnu opgpnu pogpnu ogppnu goppnu pgopnu gpopnu ppgonu ppgonu pgponu gpponu pgponu gpponu oppngu popngu oppngu popngu ppongu ppongu opnpgu ponpgu onppgu noppgu pnopgu npopgu opnpgu ponpgu onppgu noppgu pnopgu npopgu ppnogu ppnogu pnpogu nppogu pnpogu nppogu opgnpu pognpu ogpnpu gopnpu pgonpu gponpu opngpu pongpu onpgpu nopgpu pnogpu npogpu ognppu gonppu ongppu nogppu gnoppu ngoppu pgnopu gpnopu pngopu npgopu gnpopu ngpopu opgnpu pognpu ogpnpu gopnpu pgonpu gponpu opngpu pongpu onpgpu nopgpu pnogpu npogpu ognppu gonppu ongppu nogppu gnoppu ngoppu pgnopu gpnopu pngopu npgopu gnpopu ngpopu ppgnou ppgnou pgpnou gppnou pgpnou gppnou ppngou ppngou pnpgou nppgou pnpgou nppgou pgnpou gpnpou pngpou npgpou gnppou ngppou pgnpou gpnpou pngpou npgpou gnppou ngppou opugnp pougnp oupgnp uopgnp puognp upognp opgunp pogunp ogpunp gopunp pgounp gpounp ougpnp uogpnp ogupnp goupnp ugopnp guopnp pugonp upgonp pguonp gpuonp ugponp guponp opungp poungp oupngp uopngp puongp upongp opnugp ponugp onpugp nopugp pnougp npougp ounpgp uonpgp onupgp noupgp unopgp nuopgp punogp upnogp pnuogp npuogp unpogp nupogp opgnup pognup ogpnup gopnup pgonup gponup opngup pongup onpgup nopgup pnogup npogup ognpup gonpup ongpup nogpup gnopup ngopup pgnoup gpnoup pngoup npgoup gnpoup ngpoup ougnpp uognpp ogunpp gounpp ugonpp guonpp oungpp uongpp onugpp nougpp unogpp nuogpp ognupp gonupp ongupp nogupp gnoupp ngoupp ugnopp gunopp ungopp nugopp gnuopp nguopp pugnop upgnop pgunop gpunop ugpnop gupnop pungop upngop pnugop npugop unpgop nupgop pgnuop gpnuop pnguop npguop gnpuop ngpuop ugnpop gunpop ungpop nugpop gnupop ngupop opugnp pougnp oupgnp uopgnp puognp upognp opgunp pogunp ogpunp gopunp pgounp gpounp ougpnp uogpnp ogupnp goupnp ugopnp guopnp pugonp upgonp pguonp gpuonp ugponp guponp opungp poungp oupngp uopngp puongp upongp opnugp ponugp onpugp nopugp pnougp npougp ounpgp uonpgp onupgp noupgp unopgp nuopgp punogp upnogp pnuogp npuogp unpogp nupogp opgnup pognup ogpnup gopnup pgonup gponup opngup pongup onpgup nopgup pnogup npogup ognpup gonpup ongpup nogpup gnopup ngopup pgnoup gpnoup pngoup npgoup gnpoup ngpoup ougnpp uognpp ogunpp gounpp ugonpp guonpp oungpp uongpp onugpp nougpp unogpp nuogpp ognupp gonupp ongupp nogupp gnoupp ngoupp ugnopp gunopp ungopp nugopp gnuopp nguopp pugnop upgnop pgunop gpunop ugpnop gupnop pungop upngop pnugop npugop unpgop nupgop pgnuop gpnuop pnguop npguop gnpuop ngpuop ugnpop gunpop ungpop nugpop gnupop ngupop ppugno ppugno pupgno uppgno pupgno uppgno ppguno ppguno pgpuno gppuno pgpuno gppuno pugpno upgpno pgupno gpupno ugppno guppno pugpno upgpno pgupno gpupno ugppno guppno ppungo ppungo pupngo uppngo pupngo uppngo ppnugo ppnugo pnpugo nppugo pnpugo nppugo punpgo upnpgo pnupgo npupgo unppgo nuppgo punpgo upnpgo pnupgo npupgo unppgo nuppgo ppgnuo ppgnuo pgpnuo gppnuo pgpnuo gppnuo ppnguo ppnguo pnpguo nppguo pnpguo nppguo pgnpuo gpnpuo pngpuo npgpuo gnppuo ngppuo pgnpuo gpnpuo pngpuo npgpuo gnppuo ngppuo pugnpo upgnpo pgunpo gpunpo ugpnpo gupnpo pungpo upngpo pnugpo npugpo unpgpo nupgpo pgnupo gpnupo pngupo npgupo gnpupo ngpupo ugnppo gunppo ungppo nugppo gnuppo nguppo pugnpo upgnpo pgunpo gpunpo ugpnpo gupnpo pungpo upngpo pnugpo npugpo unpgpo nupgpo pgnupo gpnupo pngupo npgupo gnpupo ngpupo ugnppo gunppo ungppo nugppo gnuppo nguppo
Note: these 'words' (valid or invalid) are all the permutations of the word oppugn. These words are obtained by scrambling the letters in oppugn.