racker arcker rcaker craker acrker carker rakcer arkcer rkacer kracer akrcer karcer rckaer crkaer rkcaer krcaer ckraer kcraer ackrer cakrer akcrer kacrer ckarer kcarer racekr arcekr rcaekr craekr acrekr carekr raeckr areckr reackr erackr aerckr earckr rceakr creakr recakr ercakr cerakr ecrakr acerkr caerkr aecrkr eacrkr cearkr ecarkr rakecr arkecr rkaecr kraecr akrecr karecr raekcr arekcr reakcr erakcr aerkcr earkcr rkeacr kreacr rekacr erkacr keracr ekracr akercr kaercr aekrcr eakrcr kearcr ekarcr rckear crkear rkcear krcear ckrear kcrear rcekar crekar reckar erckar cerkar ecrkar rkecar krecar rekcar erkcar kercar ekrcar ckerar kcerar cekrar eckrar kecrar ekcrar ackerr cakerr akcerr kacerr ckaerr kcaerr acekrr caekrr aeckrr eackrr ceakrr ecakrr akecrr kaecrr aekcrr eakcrr keacrr ekacrr ckearr kcearr cekarr eckarr kecarr ekcarr rackre arckre rcakre crakre acrkre carkre rakcre arkcre rkacre kracre akrcre karcre rckare crkare rkcare krcare ckrare kcrare ackrre cakrre akcrre kacrre ckarre kcarre racrke arcrke rcarke crarke acrrke carrke rarcke arrcke rracke rracke arrcke rarcke rcrake crrake rrcake rrcake crrake rcrake acrrke carrke arcrke racrke crarke rcarke rakrce arkrce rkarce krarce akrrce karrce rarkce arrkce rrakce rrakce arrkce rarkce rkrace krrace rrkace rrkace krrace rkrace akrrce karrce arkrce rakrce krarce rkarce rckrae crkrae rkcrae krcrae ckrrae kcrrae rcrkae crrkae rrckae rrckae crrkae rcrkae rkrcae krrcae rrkcae rrkcae krrcae rkrcae ckrrae kcrrae crkrae rckrae krcrae rkcrae ackrre cakrre akcrre kacrre ckarre kcarre acrkre carkre arckre rackre crakre rcakre akrcre karcre arkcre rakcre kracre rkacre ckrare kcrare crkare rckare krcare rkcare racerk arcerk rcaerk craerk acrerk carerk raecrk arecrk reacrk eracrk aercrk earcrk rceark creark recark ercark cerark ecrark acerrk caerrk aecrrk eacrrk cearrk ecarrk racrek arcrek rcarek crarek acrrek carrek rarcek arrcek rracek rracek arrcek rarcek rcraek crraek rrcaek rrcaek crraek rcraek acrrek carrek arcrek racrek crarek rcarek raerck arerck rearck erarck aerrck earrck rareck arreck rraeck rraeck arreck rareck rerack errack rreack rreack errack rerack aerrck earrck arerck raerck erarck rearck rcerak crerak recrak ercrak cerrak ecrrak rcreak crreak rrceak rrceak crreak rcreak rercak errcak rrecak rrecak errcak rercak cerrak ecrrak crerak rcerak ercrak recrak acerrk caerrk aecrrk eacrrk cearrk ecarrk acrerk carerk arcerk racerk craerk rcaerk aercrk earcrk arecrk raecrk eracrk reacrk cerark ecrark creark rceark ercark recark rakerc arkerc rkaerc kraerc akrerc karerc raekrc arekrc reakrc erakrc aerkrc earkrc rkearc krearc rekarc erkarc kerarc ekrarc akerrc kaerrc aekrrc eakrrc kearrc ekarrc rakrec arkrec rkarec krarec akrrec karrec rarkec arrkec rrakec rrakec arrkec rarkec rkraec krraec rrkaec rrkaec krraec rkraec akrrec karrec arkrec rakrec krarec rkarec raerkc arerkc rearkc erarkc aerrkc earrkc rarekc arrekc rraekc rraekc arrekc rarekc rerakc errakc rreakc rreakc errakc rerakc aerrkc earrkc arerkc raerkc erarkc rearkc rkerac krerac rekrac erkrac kerrac ekrrac rkreac krreac rrkeac rrkeac krreac rkreac rerkac errkac rrekac rrekac errkac rerkac kerrac ekrrac krerac rkerac erkrac rekrac akerrc kaerrc aekrrc eakrrc kearrc ekarrc akrerc karerc arkerc rakerc kraerc rkaerc aerkrc earkrc arekrc raekrc erakrc reakrc kerarc ekrarc krearc rkearc erkarc rekarc rckera crkera rkcera krcera ckrera kcrera rcekra crekra reckra erckra cerkra ecrkra rkecra krecra rekcra erkcra kercra ekrcra ckerra kcerra cekrra eckrra kecrra ekcrra rckrea crkrea rkcrea krcrea ckrrea kcrrea rcrkea crrkea rrckea rrckea crrkea rcrkea rkrcea krrcea rrkcea rrkcea krrcea rkrcea ckrrea kcrrea crkrea rckrea krcrea rkcrea rcerka crerka recrka ercrka cerrka ecrrka rcreka crreka rrceka rrceka crreka rcreka rercka errcka rrecka rrecka errcka rercka cerrka ecrrka crerka rcerka ercrka recrka rkerca krerca rekrca erkrca kerrca ekrrca rkreca krreca rrkeca rrkeca krreca rkreca rerkca errkca rrekca rrekca errkca rerkca kerrca ekrrca krerca rkerca erkrca rekrca ckerra kcerra cekrra eckrra kecrra ekcrra ckrera kcrera crkera rckera krcera rkcera cerkra ecrkra crekra rcekra erckra reckra kercra ekrcra krecra rkecra erkcra rekcra ackerr cakerr akcerr kacerr ckaerr kcaerr acekrr caekrr aeckrr eackrr ceakrr ecakrr akecrr kaecrr aekcrr eakcrr keacrr ekacrr ckearr kcearr cekarr eckarr kecarr ekcarr ackrer cakrer akcrer kacrer ckarer kcarer acrker carker arcker racker craker rcaker akrcer karcer arkcer rakcer kracer rkacer ckraer kcraer crkaer rckaer krcaer rkcaer acerkr caerkr aecrkr eacrkr cearkr ecarkr acrekr carekr arcekr racekr craekr rcaekr aerckr earckr areckr raeckr erackr reackr cerakr ecrakr creakr rceakr ercakr recakr akercr kaercr aekrcr eakrcr kearcr ekarcr akrecr karecr arkecr rakecr kraecr rkaecr aerkcr earkcr arekcr raekcr erakcr reakcr keracr ekracr kreacr rkeacr erkacr rekacr ckerar kcerar cekrar eckrar kecrar ekcrar ckrear kcrear crkear rckear krcear rkcear cerkar ecrkar crekar rcekar erckar reckar kercar ekrcar krecar rkecar erkcar rekcar
Note: these 'words' (valid or invalid) are all the permutations of the word racker. These words are obtained by scrambling the letters in racker.