sprung psrung srpung rspung prsung rpsung spurng psurng suprng usprng pusrng upsrng srupng rsupng surpng usrpng ruspng urspng prusng rpusng pursng uprsng rupsng urpsng sprnug psrnug srpnug rspnug prsnug rpsnug spnrug psnrug snprug nsprug pnsrug npsrug srnpug rsnpug snrpug nsrpug rnspug nrspug prnsug rpnsug pnrsug nprsug rnpsug nrpsug spunrg psunrg supnrg uspnrg pusnrg upsnrg spnurg psnurg snpurg nspurg pnsurg npsurg sunprg usnprg snuprg nsuprg unsprg nusprg punsrg upnsrg pnusrg npusrg unpsrg nupsrg srunpg rsunpg surnpg usrnpg rusnpg ursnpg srnupg rsnupg snrupg nsrupg rnsupg nrsupg sunrpg usnrpg snurpg nsurpg unsrpg nusrpg runspg urnspg rnuspg nruspg unrspg nurspg prunsg rpunsg purnsg uprnsg rupnsg urpnsg prnusg rpnusg pnrusg nprusg rnpusg nrpusg punrsg upnrsg pnursg npursg unprsg nuprsg runpsg urnpsg rnupsg nrupsg unrpsg nurpsg sprugn psrugn srpugn rspugn prsugn rpsugn spurgn psurgn suprgn usprgn pusrgn upsrgn srupgn rsupgn surpgn usrpgn ruspgn urspgn prusgn rpusgn pursgn uprsgn rupsgn urpsgn sprgun psrgun srpgun rspgun prsgun rpsgun spgrun psgrun sgprun gsprun pgsrun gpsrun srgpun rsgpun sgrpun gsrpun rgspun grspun prgsun rpgsun pgrsun gprsun rgpsun grpsun spugrn psugrn supgrn uspgrn pusgrn upsgrn spgurn psgurn sgpurn gspurn pgsurn gpsurn sugprn usgprn sguprn gsuprn ugsprn gusprn pugsrn upgsrn pgusrn gpusrn ugpsrn gupsrn srugpn rsugpn surgpn usrgpn rusgpn ursgpn srgupn rsgupn sgrupn gsrupn rgsupn grsupn sugrpn usgrpn sgurpn gsurpn ugsrpn gusrpn rugspn urgspn rguspn gruspn ugrspn gurspn prugsn rpugsn purgsn uprgsn rupgsn urpgsn prgusn rpgusn pgrusn gprusn rgpusn grpusn pugrsn upgrsn pgursn gpursn ugprsn guprsn rugpsn urgpsn rgupsn grupsn ugrpsn gurpsn sprngu psrngu srpngu rspngu prsngu rpsngu spnrgu psnrgu snprgu nsprgu pnsrgu npsrgu srnpgu rsnpgu snrpgu nsrpgu rnspgu nrspgu prnsgu rpnsgu pnrsgu nprsgu rnpsgu nrpsgu sprgnu psrgnu srpgnu rspgnu prsgnu rpsgnu spgrnu psgrnu sgprnu gsprnu pgsrnu gpsrnu srgpnu rsgpnu sgrpnu gsrpnu rgspnu grspnu prgsnu rpgsnu pgrsnu gprsnu rgpsnu grpsnu spngru psngru snpgru nspgru pnsgru npsgru spgnru psgnru sgpnru gspnru pgsnru gpsnru sngpru nsgpru sgnpru gsnpru ngspru gnspru pngsru npgsru pgnsru gpnsru ngpsru gnpsru srngpu rsngpu snrgpu nsrgpu rnsgpu nrsgpu srgnpu rsgnpu sgrnpu gsrnpu rgsnpu grsnpu sngrpu nsgrpu sgnrpu gsnrpu ngsrpu gnsrpu rngspu nrgspu rgnspu grnspu ngrspu gnrspu prngsu rpngsu pnrgsu nprgsu rnpgsu nrpgsu prgnsu rpgnsu pgrnsu gprnsu rgpnsu grpnsu pngrsu npgrsu pgnrsu gpnrsu ngprsu gnprsu rngpsu nrgpsu rgnpsu grnpsu ngrpsu gnrpsu spungr psungr supngr uspngr pusngr upsngr spnugr psnugr snpugr nspugr pnsugr npsugr sunpgr usnpgr snupgr nsupgr unspgr nuspgr punsgr upnsgr pnusgr npusgr unpsgr nupsgr spugnr psugnr supgnr uspgnr pusgnr upsgnr spgunr psgunr sgpunr gspunr pgsunr gpsunr sugpnr usgpnr sgupnr gsupnr ugspnr guspnr pugsnr upgsnr pgusnr gpusnr ugpsnr gupsnr spngur psngur snpgur nspgur pnsgur npsgur spgnur psgnur sgpnur gspnur pgsnur gpsnur sngpur nsgpur sgnpur gsnpur ngspur gnspur pngsur npgsur pgnsur gpnsur ngpsur gnpsur sungpr usngpr snugpr nsugpr unsgpr nusgpr sugnpr usgnpr sgunpr gsunpr ugsnpr gusnpr sngupr nsgupr sgnupr gsnupr ngsupr gnsupr ungspr nugspr ugnspr gunspr nguspr gnuspr pungsr upngsr pnugsr npugsr unpgsr nupgsr pugnsr upgnsr pgunsr gpunsr ugpnsr gupnsr pngusr npgusr pgnusr gpnusr ngpusr gnpusr ungpsr nugpsr ugnpsr gunpsr ngupsr gnupsr srungp rsungp surngp usrngp rusngp ursngp srnugp rsnugp snrugp nsrugp rnsugp nrsugp sunrgp usnrgp snurgp nsurgp unsrgp nusrgp runsgp urnsgp rnusgp nrusgp unrsgp nursgp srugnp rsugnp surgnp usrgnp rusgnp ursgnp srgunp rsgunp sgrunp gsrunp rgsunp grsunp sugrnp usgrnp sgurnp gsurnp ugsrnp gusrnp rugsnp urgsnp rgusnp grusnp ugrsnp gursnp srngup rsngup snrgup nsrgup rnsgup nrsgup srgnup rsgnup sgrnup gsrnup rgsnup grsnup sngrup nsgrup sgnrup gsnrup ngsrup gnsrup rngsup nrgsup rgnsup grnsup ngrsup gnrsup sungrp usngrp snugrp nsugrp unsgrp nusgrp sugnrp usgnrp sgunrp gsunrp ugsnrp gusnrp sngurp nsgurp sgnurp gsnurp ngsurp gnsurp ungsrp nugsrp ugnsrp gunsrp ngusrp gnusrp rungsp urngsp rnugsp nrugsp unrgsp nurgsp rugnsp urgnsp rgunsp grunsp ugrnsp gurnsp rngusp nrgusp rgnusp grnusp ngrusp gnrusp ungrsp nugrsp ugnrsp gunrsp ngursp gnursp prungs rpungs purngs uprngs rupngs urpngs prnugs rpnugs pnrugs nprugs rnpugs nrpugs punrgs upnrgs pnurgs npurgs unprgs nuprgs runpgs urnpgs rnupgs nrupgs unrpgs nurpgs prugns rpugns purgns uprgns rupgns urpgns prguns rpguns pgruns gpruns rgpuns grpuns pugrns upgrns pgurns gpurns ugprns guprns rugpns urgpns rgupns grupns ugrpns gurpns prngus rpngus pnrgus nprgus rnpgus nrpgus prgnus rpgnus pgrnus gprnus rgpnus grpnus pngrus npgrus pgnrus gpnrus ngprus gnprus rngpus nrgpus rgnpus grnpus ngrpus gnrpus pungrs upngrs pnugrs npugrs unpgrs nupgrs pugnrs upgnrs pgunrs gpunrs ugpnrs gupnrs pngurs npgurs pgnurs gpnurs ngpurs gnpurs ungprs nugprs ugnprs gunprs nguprs gnuprs rungps urngps rnugps nrugps unrgps nurgps rugnps urgnps rgunps grunps ugrnps gurnps rngups nrgups rgnups grnups ngrups gnrups ungrps nugrps ugnrps gunrps ngurps gnurps
Note: these 'words' (valid or invalid) are all the permutations of the word sprung. These words are obtained by scrambling the letters in sprung.