serval esrval sreval rseval ersval resval sevral esvral sveral vseral evsral vesral srveal rsveal svreal vsreal rvseal vrseal ervsal revsal evrsal versal rvesal vresal seravl esravl sreavl rseavl ersavl resavl searvl esarvl saervl aservl easrvl aesrvl sraevl rsaevl sarevl asrevl rasevl arsevl erasvl reasvl earsvl aersvl raesvl aresvl sevarl esvarl svearl vsearl evsarl vesarl seavrl esavrl saevrl asevrl easvrl aesvrl svaerl vsaerl saverl asverl vaserl avserl evasrl veasrl eavsrl aevsrl vaesrl avesrl srvael rsvael svrael vsrael rvsael vrsael sravel rsavel sarvel asrvel rasvel arsvel svarel vsarel savrel asvrel vasrel avsrel rvasel vrasel ravsel arvsel varsel avrsel ervasl revasl evrasl verasl rveasl vreasl eravsl reavsl earvsl aervsl raevsl arevsl evarsl vearsl eavrsl aevrsl vaersl aversl rvaesl vraesl ravesl arvesl varesl avresl servla esrvla srevla rsevla ersvla resvla sevrla esvrla sverla vserla evsrla vesrla srvela rsvela svrela vsrela rvsela vrsela ervsla revsla evrsla versla rvesla vresla serlva esrlva srelva rselva erslva reslva selrva eslrva slerva lserva elsrva lesrva srleva rsleva slreva lsreva rlseva lrseva erlsva relsva elrsva lersva rlesva lresva sevlra esvlra svelra vselra evslra veslra selvra eslvra slevra lsevra elsvra lesvra svlera vslera slvera lsvera vlsera lvsera evlsra velsra elvsra levsra vlesra lvesra srvlea rsvlea svrlea vsrlea rvslea vrslea srlvea rslvea slrvea lsrvea rlsvea lrsvea svlrea vslrea slvrea lsvrea vlsrea lvsrea rvlsea vrlsea rlvsea lrvsea vlrsea lvrsea ervlsa revlsa evrlsa verlsa rvelsa vrelsa erlvsa relvsa elrvsa lervsa rlevsa lrevsa evlrsa velrsa elvrsa levrsa vlersa lversa rvlesa vrlesa rlvesa lrvesa vlresa lvresa seralv esralv srealv rsealv ersalv resalv searlv esarlv saerlv aserlv easrlv aesrlv sraelv rsaelv sarelv asrelv raselv arselv eraslv reaslv earslv aerslv raeslv areslv serlav esrlav srelav rselav erslav reslav selrav eslrav slerav lserav elsrav lesrav srleav rsleav slreav lsreav rlseav lrseav erlsav relsav elrsav lersav rlesav lresav sealrv esalrv saelrv aselrv easlrv aeslrv selarv eslarv slearv lsearv elsarv lesarv salerv aslerv slaerv lsaerv alserv laserv ealsrv aelsrv elasrv leasrv alesrv laesrv sralev rsalev sarlev asrlev raslev arslev srlaev rslaev slraev lsraev rlsaev lrsaev salrev aslrev slarev lsarev alsrev lasrev ralsev arlsev rlasev lrasev alrsev larsev eralsv realsv earlsv aerlsv raelsv arelsv erlasv relasv elrasv lerasv rleasv lreasv ealrsv aelrsv elarsv learsv alersv laersv ralesv arlesv rlaesv lraesv alresv laresv sevalr esvalr svealr vsealr evsalr vesalr seavlr esavlr saevlr asevlr easvlr aesvlr svaelr vsaelr savelr asvelr vaselr avselr evaslr veaslr eavslr aevslr vaeslr aveslr sevlar esvlar svelar vselar evslar veslar selvar eslvar slevar lsevar elsvar lesvar svlear vslear slvear lsvear vlsear lvsear evlsar velsar elvsar levsar vlesar lvesar sealvr esalvr saelvr aselvr easlvr aeslvr selavr eslavr sleavr lseavr elsavr lesavr salevr aslevr slaevr lsaevr alsevr lasevr ealsvr aelsvr elasvr leasvr alesvr laesvr svaler vsaler savler asvler vasler avsler svlaer vslaer slvaer lsvaer vlsaer lvsaer salver aslver slaver lsaver alsver lasver valser avlser vlaser lvaser alvser lavser evalsr vealsr eavlsr aevlsr vaelsr avelsr evlasr velasr elvasr levasr vleasr lveasr ealvsr aelvsr elavsr leavsr alevsr laevsr valesr avlesr vlaesr lvaesr alvesr lavesr srvale rsvale svrale vsrale rvsale vrsale sravle rsavle sarvle asrvle rasvle arsvle svarle vsarle savrle asvrle vasrle avsrle rvasle vrasle ravsle arvsle varsle avrsle srvlae rsvlae svrlae vsrlae rvslae vrslae srlvae rslvae slrvae lsrvae rlsvae lrsvae svlrae vslrae slvrae lsvrae vlsrae lvsrae rvlsae vrlsae rlvsae lrvsae vlrsae lvrsae sralve rsalve sarlve asrlve raslve arslve srlave rslave slrave lsrave rlsave lrsave salrve aslrve slarve lsarve alsrve lasrve ralsve arlsve rlasve lrasve alrsve larsve svalre vsalre savlre asvlre vaslre avslre svlare vslare slvare lsvare vlsare lvsare salvre aslvre slavre lsavre alsvre lasvre valsre avlsre vlasre lvasre alvsre lavsre rvalse vralse ravlse arvlse varlse avrlse rvlase vrlase rlvase lrvase vlrase lvrase ralvse arlvse rlavse lravse alrvse larvse valrse avlrse vlarse lvarse alvrse lavrse ervals revals evrals verals rveals vreals eravls reavls earvls aervls raevls arevls evarls vearls eavrls aevrls vaerls averls rvaels vraels ravels arvels varels avrels ervlas revlas evrlas verlas rvelas vrelas erlvas relvas elrvas lervas rlevas lrevas evlras velras elvras levras vleras lveras rvleas vrleas rlveas lrveas vlreas lvreas eralvs realvs earlvs aerlvs raelvs arelvs erlavs relavs elravs leravs rleavs lreavs ealrvs aelrvs elarvs learvs alervs laervs ralevs arlevs rlaevs lraevs alrevs larevs evalrs vealrs eavlrs aevlrs vaelrs avelrs evlars velars elvars levars vlears lvears ealvrs aelvrs elavrs leavrs alevrs laevrs valers avlers vlaers lvaers alvers lavers rvales vrales ravles arvles varles avrles rvlaes vrlaes rlvaes lrvaes vlraes lvraes ralves arlves rlaves lraves alrves larves valres avlres vlares lvares alvres lavres
Note: these 'words' (valid or invalid) are all the permutations of the word serval. These words are obtained by scrambling the letters in serval.