doubly odubly duobly udobly oudbly uodbly dobuly odbuly dbouly bdouly obduly boduly duboly udboly dbuoly bduoly ubdoly budoly oubdly uobdly obudly boudly ubodly buodly doulby odulby duolby udolby oudlby uodlby doluby odluby dlouby ldouby olduby loduby duloby udloby dluoby lduoby uldoby ludoby ouldby uoldby oludby loudby ulodby luodby dobluy odbluy dboluy bdoluy obdluy bodluy dolbuy odlbuy dlobuy ldobuy oldbuy lodbuy dblouy bdlouy dlbouy ldbouy bldouy lbdouy oblduy bolduy olbduy lobduy bloduy lboduy dubloy udbloy dbuloy bduloy ubdloy budloy dulboy udlboy dluboy lduboy uldboy ludboy dbluoy bdluoy dlbuoy ldbuoy blduoy lbduoy ubldoy buldoy ulbdoy lubdoy bludoy lbudoy oubldy uobldy obuldy bouldy uboldy buoldy oulbdy uolbdy olubdy loubdy ulobdy luobdy obludy boludy olbudy lobudy bloudy lboudy ublody bulody ulbody lubody bluody lbuody doubyl odubyl duobyl udobyl oudbyl uodbyl dobuyl odbuyl dbouyl bdouyl obduyl boduyl duboyl udboyl dbuoyl bduoyl ubdoyl budoyl oubdyl uobdyl obudyl boudyl ubodyl buodyl douybl oduybl duoybl udoybl oudybl uodybl doyubl odyubl dyoubl ydoubl oydubl yodubl duyobl udyobl dyuobl yduobl uydobl yudobl ouydbl uoydbl oyudbl youdbl uyodbl yuodbl dobyul odbyul dboyul bdoyul obdyul bodyul doybul odybul dyobul ydobul oydbul yodbul dbyoul bdyoul dyboul ydboul bydoul ybdoul obydul boydul oybdul yobdul byodul ybodul dubyol udbyol dbuyol bduyol ubdyol budyol duybol udybol dyubol ydubol uydbol yudbol dbyuol bdyuol dybuol ydbuol byduol ybduol ubydol buydol uybdol yubdol byudol ybudol oubydl uobydl obuydl bouydl uboydl buoydl ouybdl uoybdl oyubdl youbdl uyobdl yuobdl obyudl boyudl oybudl yobudl byoudl yboudl ubyodl buyodl uybodl yubodl byuodl ybuodl doulyb odulyb duolyb udolyb oudlyb uodlyb doluyb odluyb dlouyb ldouyb olduyb loduyb duloyb udloyb dluoyb lduoyb uldoyb ludoyb ouldyb uoldyb oludyb loudyb ulodyb luodyb douylb oduylb duoylb udoylb oudylb uodylb doyulb odyulb dyoulb ydoulb oydulb yodulb duyolb udyolb dyuolb yduolb uydolb yudolb ouydlb uoydlb oyudlb youdlb uyodlb yuodlb dolyub odlyub dloyub ldoyub oldyub lodyub doylub odylub dyolub ydolub oydlub yodlub dlyoub ldyoub dyloub ydloub lydoub yldoub olydub loydub oyldub yoldub lyodub ylodub dulyob udlyob dluyob lduyob uldyob ludyob duylob udylob dyulob ydulob uydlob yudlob dlyuob ldyuob dyluob ydluob lyduob ylduob ulydob luydob uyldob yuldob lyudob yludob oulydb uolydb oluydb louydb uloydb luoydb ouyldb uoyldb oyuldb youldb uyoldb yuoldb olyudb loyudb oyludb yoludb lyoudb yloudb ulyodb luyodb uylodb yulodb lyuodb yluodb doblyu odblyu dbolyu bdolyu obdlyu bodlyu dolbyu odlbyu dlobyu ldobyu oldbyu lodbyu dbloyu bdloyu dlboyu ldboyu bldoyu lbdoyu obldyu boldyu olbdyu lobdyu blodyu lbodyu dobylu odbylu dboylu bdoylu obdylu bodylu doyblu odyblu dyoblu ydoblu oydblu yodblu dbyolu bdyolu dybolu ydbolu bydolu ybdolu obydlu boydlu oybdlu yobdlu byodlu ybodlu dolybu odlybu dloybu ldoybu oldybu lodybu doylbu odylbu dyolbu ydolbu oydlbu yodlbu dlyobu ldyobu dylobu ydlobu lydobu yldobu olydbu loydbu oyldbu yoldbu lyodbu ylodbu dblyou bdlyou dlbyou ldbyou bldyou lbdyou dbylou bdylou dyblou ydblou bydlou ybdlou dlybou ldybou dylbou ydlbou lydbou yldbou blydou lbydou byldou ybldou lybdou ylbdou oblydu bolydu olbydu lobydu bloydu lboydu obyldu boyldu oybldu yobldu byoldu yboldu olybdu loybdu oylbdu yolbdu lyobdu ylobdu blyodu lbyodu bylodu yblodu lybodu ylbodu dublyo udblyo dbulyo bdulyo ubdlyo budlyo dulbyo udlbyo dlubyo ldubyo uldbyo ludbyo dbluyo bdluyo dlbuyo ldbuyo blduyo lbduyo ubldyo buldyo ulbdyo lubdyo bludyo lbudyo dubylo udbylo dbuylo bduylo ubdylo budylo duyblo udyblo dyublo ydublo uydblo yudblo dbyulo bdyulo dybulo ydbulo bydulo ybdulo ubydlo buydlo uybdlo yubdlo byudlo ybudlo dulybo udlybo dluybo lduybo uldybo ludybo duylbo udylbo dyulbo ydulbo uydlbo yudlbo dlyubo ldyubo dylubo ydlubo lydubo yldubo ulydbo luydbo uyldbo yuldbo lyudbo yludbo dblyuo bdlyuo dlbyuo ldbyuo bldyuo lbdyuo dbyluo bdyluo dybluo ydbluo bydluo ybdluo dlybuo ldybuo dylbuo ydlbuo lydbuo yldbuo blyduo lbyduo bylduo yblduo lybduo ylbduo ublydo bulydo ulbydo lubydo bluydo lbuydo ubyldo buyldo uybldo yubldo byuldo ybuldo ulybdo luybdo uylbdo yulbdo lyubdo ylubdo blyudo lbyudo byludo ybludo lybudo ylbudo oublyd uoblyd obulyd boulyd ubolyd buolyd oulbyd uolbyd olubyd loubyd ulobyd luobyd obluyd boluyd olbuyd lobuyd blouyd lbouyd ubloyd buloyd ulboyd luboyd bluoyd lbuoyd oubyld uobyld obuyld bouyld uboyld buoyld ouybld uoybld oyubld youbld uyobld yuobld obyuld boyuld oybuld yobuld byould ybould ubyold buyold uybold yubold byuold ybuold oulybd uolybd oluybd louybd uloybd luoybd ouylbd uoylbd oyulbd youlbd uyolbd yuolbd olyubd loyubd oylubd yolubd lyoubd yloubd ulyobd luyobd uylobd yulobd lyuobd yluobd oblyud bolyud olbyud lobyud bloyud lboyud obylud boylud oyblud yoblud byolud ybolud olybud loybud oylbud yolbud lyobud ylobud blyoud lbyoud byloud ybloud lyboud ylboud ublyod bulyod ulbyod lubyod bluyod lbuyod ubylod buylod uyblod yublod byulod ybulod ulybod luybod uylbod yulbod lyubod ylubod blyuod lbyuod byluod ybluod lybuod ylbuod
Note: these 'words' (valid or invalid) are all the permutations of the word doubly. These words are obtained by scrambling the letters in doubly.