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