madder amdder mdader dmader admder damder madder amdder mdader dmader admder damder mddaer dmdaer mddaer dmdaer ddmaer ddmaer addmer dadmer addmer dadmer ddamer ddamer madedr amdedr mdaedr dmaedr admedr damedr maeddr ameddr meaddr emaddr aemddr eamddr mdeadr dmeadr medadr emdadr demadr edmadr ademdr daemdr aedmdr eadmdr deamdr edamdr madedr amdedr mdaedr dmaedr admedr damedr maeddr ameddr meaddr emaddr aemddr eamddr mdeadr dmeadr medadr emdadr demadr edmadr ademdr daemdr aedmdr eadmdr deamdr edamdr mddear dmdear mddear dmdear ddmear ddmear mdedar dmedar meddar emddar demdar edmdar mdedar dmedar meddar emddar demdar edmdar ddemar ddemar dedmar eddmar dedmar eddmar addemr dademr addemr dademr ddaemr ddaemr adedmr daedmr aeddmr eaddmr deadmr edadmr adedmr daedmr aeddmr eaddmr deadmr edadmr ddeamr ddeamr dedamr eddamr dedamr eddamr maddre amddre mdadre dmadre admdre damdre maddre amddre mdadre dmadre admdre damdre mddare dmdare mddare dmdare ddmare ddmare addmre dadmre addmre dadmre ddamre ddamre madrde amdrde mdarde dmarde admrde damrde mardde amrdde mradde rmadde armdde ramdde mdrade dmrade mrdade rmdade drmade rdmade adrmde darmde ardmde radmde dramde rdamde madrde amdrde mdarde dmarde admrde damrde mardde amrdde mradde rmadde armdde ramdde mdrade dmrade mrdade rmdade drmade rdmade adrmde darmde ardmde radmde dramde rdamde mddrae dmdrae mddrae dmdrae ddmrae ddmrae mdrdae dmrdae mrddae rmddae drmdae rdmdae mdrdae dmrdae mrddae rmddae drmdae rdmdae ddrmae ddrmae drdmae rddmae drdmae rddmae addrme dadrme addrme dadrme ddarme ddarme adrdme dardme arddme raddme dradme rdadme adrdme dardme arddme raddme dradme rdadme ddrame ddrame drdame rddame drdame rddame maderd amderd mdaerd dmaerd admerd damerd maedrd amedrd meadrd emadrd aemdrd eamdrd mdeard dmeard medard emdard demard edmard ademrd daemrd aedmrd eadmrd deamrd edamrd madred amdred mdared dmared admred damred marded amrded mraded rmaded armded ramded mdraed dmraed mrdaed rmdaed drmaed rdmaed adrmed darmed ardmed radmed dramed rdamed maerdd amerdd meardd emardd aemrdd eamrdd maredd amredd mraedd rmaedd armedd ramedd meradd emradd mreadd rmeadd ermadd remadd aermdd earmdd aremdd raemdd eramdd reamdd mderad dmerad medrad emdrad demrad edmrad mdread dmread mrdead rmdead drmead rdmead merdad emrdad mredad rmedad ermdad remdad dermad edrmad dremad rdemad erdmad redmad adermd daermd aedrmd eadrmd dearmd edarmd adremd daremd ardemd rademd draemd rdaemd aerdmd eardmd aredmd raedmd eradmd readmd deramd edramd dreamd rdeamd erdamd redamd maderd amderd mdaerd dmaerd admerd damerd maedrd amedrd meadrd emadrd aemdrd eamdrd mdeard dmeard medard emdard demard edmard ademrd daemrd aedmrd eadmrd deamrd edamrd madred amdred mdared dmared admred damred marded amrded mraded rmaded armded ramded mdraed dmraed mrdaed rmdaed drmaed rdmaed adrmed darmed ardmed radmed dramed rdamed maerdd amerdd meardd emardd aemrdd eamrdd maredd amredd mraedd rmaedd armedd ramedd meradd emradd mreadd rmeadd ermadd remadd aermdd earmdd aremdd raemdd eramdd reamdd mderad dmerad medrad emdrad demrad edmrad mdread dmread mrdead rmdead drmead rdmead merdad emrdad mredad rmedad ermdad remdad dermad edrmad dremad rdemad erdmad redmad adermd daermd aedrmd eadrmd dearmd edarmd adremd daremd ardemd rademd draemd rdaemd aerdmd eardmd aredmd raedmd eradmd readmd deramd edramd dreamd rdeamd erdamd redamd mddera dmdera mddera dmdera ddmera ddmera mdedra dmedra meddra emddra demdra edmdra mdedra dmedra meddra emddra demdra edmdra ddemra ddemra dedmra eddmra dedmra eddmra mddrea dmdrea mddrea dmdrea ddmrea ddmrea mdrdea dmrdea mrddea rmddea drmdea rdmdea mdrdea dmrdea mrddea rmddea drmdea rdmdea ddrmea ddrmea drdmea rddmea drdmea rddmea mderda dmerda medrda emdrda demrda edmrda mdreda dmreda mrdeda rmdeda drmeda rdmeda merdda emrdda mredda rmedda ermdda remdda dermda edrmda dremda rdemda erdmda redmda mderda dmerda medrda emdrda demrda edmrda mdreda dmreda mrdeda rmdeda drmeda rdmeda merdda emrdda mredda rmedda ermdda remdda dermda edrmda dremda rdemda erdmda redmda dderma dderma dedrma eddrma dedrma eddrma ddrema ddrema drdema rddema drdema rddema derdma edrdma dredma rdedma erddma reddma derdma edrdma dredma rdedma erddma reddma adderm daderm adderm daderm ddaerm ddaerm adedrm daedrm aeddrm eaddrm deadrm edadrm adedrm daedrm aeddrm eaddrm deadrm edadrm ddearm ddearm dedarm eddarm dedarm eddarm addrem dadrem addrem dadrem ddarem ddarem adrdem dardem arddem raddem dradem rdadem adrdem dardem arddem raddem dradem rdadem ddraem ddraem drdaem rddaem drdaem rddaem aderdm daerdm aedrdm eadrdm deardm edardm adredm daredm ardedm radedm draedm rdaedm aerddm earddm areddm raeddm eraddm readdm deradm edradm dreadm rdeadm erdadm redadm aderdm daerdm aedrdm eadrdm deardm edardm adredm daredm ardedm radedm draedm rdaedm aerddm earddm areddm raeddm eraddm readdm deradm edradm dreadm rdeadm erdadm redadm dderam dderam dedram eddram dedram eddram ddream ddream drdeam rddeam drdeam rddeam derdam edrdam dredam rdedam erddam reddam derdam edrdam dredam rdedam erddam reddam
Note: these 'words' (valid or invalid) are all the permutations of the word madder. These words are obtained by scrambling the letters in madder.