cavern acvern cvaern vcaern avcern vacern caevrn acevrn ceavrn ecavrn aecvrn eacvrn cvearn vcearn cevarn ecvarn vecarn evcarn avecrn vaecrn aevcrn eavcrn veacrn evacrn cavren acvren cvaren vcaren avcren vacren carven acrven craven rcaven arcven racven cvraen vcraen crvaen rcvaen vrcaen rvcaen avrcen varcen arvcen ravcen vracen rvacen caervn acervn cearvn ecarvn aecrvn eacrvn carevn acrevn craevn rcaevn arcevn racevn ceravn ecravn creavn rceavn ercavn recavn aercvn earcvn arecvn raecvn eracvn reacvn cveran vceran cevran ecvran vecran evcran cvrean vcrean crvean rcvean vrcean rvcean cervan ecrvan crevan rcevan ercvan recvan vercan evrcan vrecan rvecan ervcan revcan avercn vaercn aevrcn eavrcn vearcn evarcn avrecn varecn arvecn ravecn vraecn rvaecn aervcn earvcn arevcn raevcn eravcn reavcn veracn evracn vreacn rveacn ervacn revacn cavenr acvenr cvaenr vcaenr avcenr vacenr caevnr acevnr ceavnr ecavnr aecvnr eacvnr cveanr vceanr cevanr ecvanr vecanr evcanr avecnr vaecnr aevcnr eavcnr veacnr evacnr cavner acvner cvaner vcaner avcner vacner canver acnver cnaver ncaver ancver nacver cvnaer vcnaer cnvaer ncvaer vncaer nvcaer avncer vancer anvcer navcer vnacer nvacer caenvr acenvr ceanvr ecanvr aecnvr eacnvr canevr acnevr cnaevr ncaevr ancevr nacevr cenavr ecnavr cneavr nceavr encavr necavr aencvr eancvr anecvr naecvr enacvr neacvr cvenar vcenar cevnar ecvnar vecnar evcnar cvnear vcnear cnvear ncvear vncear nvcear cenvar ecnvar cnevar ncevar encvar necvar vencar evncar vnecar nvecar envcar nevcar avencr vaencr aevncr eavncr veancr evancr avnecr vanecr anvecr navecr vnaecr nvaecr aenvcr eanvcr anevcr naevcr enavcr neavcr venacr evnacr vneacr nveacr envacr nevacr cavrne acvrne cvarne vcarne avcrne vacrne carvne acrvne cravne rcavne arcvne racvne cvrane vcrane crvane rcvane vrcane rvcane avrcne varcne arvcne ravcne vracne rvacne cavnre acvnre cvanre vcanre avcnre vacnre canvre acnvre cnavre ncavre ancvre nacvre cvnare vcnare cnvare ncvare vncare nvcare avncre vancre anvcre navcre vnacre nvacre carnve acrnve cranve rcanve arcnve racnve canrve acnrve cnarve ncarve ancrve nacrve crnave rcnave cnrave ncrave rncave nrcave arncve rancve anrcve narcve rnacve nracve cvrnae vcrnae crvnae rcvnae vrcnae rvcnae cvnrae vcnrae cnvrae ncvrae vncrae nvcrae crnvae rcnvae cnrvae ncrvae rncvae nrcvae vrncae rvncae vnrcae nvrcae rnvcae nrvcae avrnce varnce arvnce ravnce vrance rvance avnrce vanrce anvrce navrce vnarce nvarce arnvce ranvce anrvce narvce rnavce nravce vrnace rvnace vnrace nvrace rnvace nrvace caernv acernv cearnv ecarnv aecrnv eacrnv carenv acrenv craenv rcaenv arcenv racenv ceranv ecranv creanv rceanv ercanv recanv aercnv earcnv arecnv raecnv eracnv reacnv caenrv acenrv ceanrv ecanrv aecnrv eacnrv canerv acnerv cnaerv ncaerv ancerv nacerv cenarv ecnarv cnearv ncearv encarv necarv aencrv eancrv anecrv naecrv enacrv neacrv carnev acrnev cranev rcanev arcnev racnev canrev acnrev cnarev ncarev ancrev nacrev crnaev rcnaev cnraev ncraev rncaev nrcaev arncev rancev anrcev narcev rnacev nracev cernav ecrnav crenav rcenav ercnav recnav cenrav ecnrav cnerav ncerav encrav necrav crneav rcneav cnreav ncreav rnceav nrceav erncav rencav enrcav nercav rnecav nrecav aerncv earncv arencv raencv erancv reancv aenrcv eanrcv anercv naercv enarcv nearcv arnecv ranecv anrecv narecv rnaecv nraecv ernacv renacv enracv neracv rneacv nreacv cverna vcerna cevrna ecvrna vecrna evcrna cvrena vcrena crvena rcvena vrcena rvcena cervna ecrvna crevna rcevna ercvna recvna vercna evrcna vrecna rvecna ervcna revcna cvenra vcenra cevnra ecvnra vecnra evcnra cvnera vcnera cnvera ncvera vncera nvcera cenvra ecnvra cnevra ncevra encvra necvra vencra evncra vnecra nvecra envcra nevcra cvrnea vcrnea crvnea rcvnea vrcnea rvcnea cvnrea vcnrea cnvrea ncvrea vncrea nvcrea crnvea rcnvea cnrvea ncrvea rncvea nrcvea vrncea rvncea vnrcea nvrcea rnvcea nrvcea cernva ecrnva crenva rcenva ercnva recnva cenrva ecnrva cnerva ncerva encrva necrva crneva rcneva cnreva ncreva rnceva nrceva erncva rencva enrcva nercva rnecva nrecva vernca evrnca vrenca rvenca ervnca revnca venrca evnrca vnerca nverca envrca nevrca vrneca rvneca vnreca nvreca rnveca nrveca ernvca renvca enrvca nervca rnevca nrevca avernc vaernc aevrnc eavrnc vearnc evarnc avrenc varenc arvenc ravenc vraenc rvaenc aervnc earvnc arevnc raevnc eravnc reavnc veranc evranc vreanc rveanc ervanc revanc avenrc vaenrc aevnrc eavnrc veanrc evanrc avnerc vanerc anverc naverc vnaerc nvaerc aenvrc eanvrc anevrc naevrc enavrc neavrc venarc evnarc vnearc nvearc envarc nevarc avrnec varnec arvnec ravnec vranec rvanec avnrec vanrec anvrec navrec vnarec nvarec arnvec ranvec anrvec narvec rnavec nravec vrnaec rvnaec vnraec nvraec rnvaec nrvaec aernvc earnvc arenvc raenvc eranvc reanvc aenrvc eanrvc anervc naervc enarvc nearvc arnevc ranevc anrevc narevc rnaevc nraevc ernavc renavc enravc neravc rneavc nreavc vernac evrnac vrenac rvenac ervnac revnac venrac evnrac vnerac nverac envrac nevrac vrneac rvneac vnreac nvreac rnveac nrveac ernvac renvac enrvac nervac rnevac nrevac
Note: these 'words' (valid or invalid) are all the permutations of the word cavern. These words are obtained by scrambling the letters in cavern.