canker acnker cnaker ncaker ancker nacker cakner ackner ckaner kcaner akcner kacner cnkaer nckaer cknaer kcnaer nkcaer kncaer ankcer nakcer akncer kancer nkacer knacer canekr acnekr cnaekr ncaekr ancekr nacekr caenkr acenkr ceankr ecankr aecnkr eacnkr cneakr nceakr cenakr ecnakr necakr encakr aneckr naeckr aenckr eanckr neackr enackr cakenr ackenr ckaenr kcaenr akcenr kacenr caeknr aceknr ceaknr ecaknr aecknr eacknr ckeanr kceanr cekanr eckanr kecanr ekcanr akecnr kaecnr aekcnr eakcnr keacnr ekacnr cnkear nckear cknear kcnear nkcear kncear cnekar ncekar cenkar ecnkar neckar enckar ckenar kcenar ceknar ecknar kecnar ekcnar nkecar knecar nekcar enkcar kencar ekncar ankecr nakecr aknecr kanecr nkaecr knaecr anekcr naekcr aenkcr eankcr neakcr enakcr akencr kaencr aekncr eakncr keancr ekancr nkeacr kneacr nekacr enkacr kenacr eknacr cankre acnkre cnakre ncakre anckre nackre caknre acknre ckanre kcanre akcnre kacnre cnkare nckare cknare kcnare nkcare kncare ankcre nakcre akncre kancre nkacre knacre canrke acnrke cnarke ncarke ancrke nacrke carnke acrnke cranke rcanke arcnke racnke cnrake ncrake crnake rcnake nrcake rncake anrcke narcke arncke rancke nracke rnacke cakrne ackrne ckarne kcarne akcrne kacrne carkne acrkne crakne rcakne arckne rackne ckrane kcrane crkane rckane krcane rkcane akrcne karcne arkcne rakcne kracne rkacne cnkrae nckrae cknrae kcnrae nkcrae kncrae cnrkae ncrkae crnkae rcnkae nrckae rnckae ckrnae kcrnae crknae rcknae krcnae rkcnae nkrcae knrcae nrkcae rnkcae krncae rkncae ankrce nakrce aknrce kanrce nkarce knarce anrkce narkce arnkce rankce nrakce rnakce akrnce karnce arknce raknce krance rkance nkrace knrace nrkace rnkace krnace rknace canerk acnerk cnaerk ncaerk ancerk nacerk caenrk acenrk ceanrk ecanrk aecnrk eacnrk cneark nceark cenark ecnark necark encark anecrk naecrk aencrk eancrk neacrk enacrk canrek acnrek cnarek ncarek ancrek nacrek carnek acrnek cranek rcanek arcnek racnek cnraek ncraek crnaek rcnaek nrcaek rncaek anrcek narcek arncek rancek nracek rnacek caernk acernk cearnk ecarnk aecrnk eacrnk carenk acrenk craenk rcaenk arcenk racenk cerank ecrank creank rceank ercank recank aercnk earcnk arecnk raecnk eracnk reacnk cnerak ncerak cenrak ecnrak necrak encrak cnreak ncreak crneak rcneak nrceak rnceak cernak ecrnak crenak rcenak ercnak recnak nercak enrcak nrecak rnecak erncak rencak anerck naerck aenrck eanrck nearck enarck anreck nareck arneck raneck nraeck rnaeck aernck earnck arenck raenck eranck reanck nerack enrack nreack rneack ernack renack cakern ackern ckaern kcaern akcern kacern caekrn acekrn ceakrn ecakrn aeckrn eackrn ckearn kcearn cekarn eckarn kecarn ekcarn akecrn kaecrn aekcrn eakcrn keacrn ekacrn cakren ackren ckaren kcaren akcren kacren carken acrken craken rcaken arcken racken ckraen kcraen crkaen rckaen krcaen rkcaen akrcen karcen arkcen rakcen kracen rkacen caerkn acerkn cearkn ecarkn aecrkn eacrkn carekn acrekn craekn rcaekn arcekn racekn cerakn ecrakn creakn rceakn ercakn recakn aerckn earckn areckn raeckn erackn reackn ckeran kceran cekran eckran kecran ekcran ckrean kcrean crkean rckean krcean rkcean cerkan ecrkan crekan rcekan erckan reckan kercan ekrcan krecan rkecan erkcan rekcan akercn kaercn aekrcn eakrcn kearcn ekarcn akrecn karecn arkecn rakecn kraecn rkaecn aerkcn earkcn arekcn raekcn erakcn reakcn keracn ekracn kreacn rkeacn erkacn rekacn cnkera nckera cknera kcnera nkcera kncera cnekra ncekra cenkra ecnkra neckra enckra ckenra kcenra ceknra ecknra kecnra ekcnra nkecra knecra nekcra enkcra kencra ekncra cnkrea nckrea cknrea kcnrea nkcrea kncrea cnrkea ncrkea crnkea rcnkea nrckea rnckea ckrnea kcrnea crknea rcknea krcnea rkcnea nkrcea knrcea nrkcea rnkcea krncea rkncea cnerka ncerka cenrka ecnrka necrka encrka cnreka ncreka crneka rcneka nrceka rnceka cernka ecrnka crenka rcenka ercnka recnka nercka enrcka nrecka rnecka erncka rencka ckerna kcerna cekrna eckrna kecrna ekcrna ckrena kcrena crkena rckena krcena rkcena cerkna ecrkna crekna rcekna erckna reckna kercna ekrcna krecna rkecna erkcna rekcna nkerca knerca nekrca enkrca kenrca eknrca nkreca knreca nrkeca rnkeca krneca rkneca nerkca enrkca nrekca rnekca ernkca renkca kernca ekrnca krenca rkenca erknca reknca ankerc nakerc aknerc kanerc nkaerc knaerc anekrc naekrc aenkrc eankrc neakrc enakrc akenrc kaenrc aeknrc eaknrc keanrc ekanrc nkearc knearc nekarc enkarc kenarc eknarc ankrec nakrec aknrec kanrec nkarec knarec anrkec narkec arnkec rankec nrakec rnakec akrnec karnec arknec raknec kranec rkanec nkraec knraec nrkaec rnkaec krnaec rknaec anerkc naerkc aenrkc eanrkc nearkc enarkc anrekc narekc arnekc ranekc nraekc rnaekc aernkc earnkc arenkc raenkc erankc reankc nerakc enrakc nreakc rneakc ernakc renakc akernc kaernc aekrnc eakrnc kearnc ekarnc akrenc karenc arkenc rakenc kraenc rkaenc aerknc earknc areknc raeknc eraknc reaknc keranc ekranc kreanc rkeanc erkanc rekanc nkerac knerac nekrac enkrac kenrac eknrac nkreac knreac nrkeac rnkeac krneac rkneac nerkac enrkac nrekac rnekac ernkac renkac kernac ekrnac krenac rkenac erknac reknac
Note: these 'words' (valid or invalid) are all the permutations of the word canker. These words are obtained by scrambling the letters in canker.