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There are 117 eighteen-letter words containing 3D and O

added␣fuel␣to␣the␣fireadjustment␣disorderandrostadienedioneargue␣round␣and␣roundbar-shouldered␣dovesbastard␣sandalwoodsbinary-coded␣decimalbird␣dropping␣spiderbladder␣desperationBudd-Chiari␣syndromecholedochoduodenalchondrodystrophoidCuddesdon␣and␣Dentoncylindroleberididsdarkhorse␣candidatedehydrobenzperidoldehydrochlorinateddehydrocorydalminedehydrodiconiferoldehydrodiconiferyldehydrohalogenateddehydropalladationdelusional␣disorderdendrohydrologicaldendrohydrologistsDenton␣and␣Caldecotedeoxycytidylic␣aciddeoxyuridylic␣acidsdepressive␣disorderdestination␣weddingdiboron␣hexahydridedictated␣but␣not␣readdideoxynucleosidesdideoxynucleotidesdie␣a␣thousand␣deathsdied␣the␣way␣one␣liveddihydrocodeineonesdihydrogenmonoxide dihydrogen-monoxide dihydrogen␣monoxidedihydropyrimidinesdihydrostilbenoidsdihydroxyacridinesdihydroxypteridinediiodohydroquinonedioxygen␣difluoridedithiazanine␣iodidedivides␣and␣conquersdjadochtatherioidsdodecadepsipeptidedodecadodecahedraldodecadodecahedrondodecaploidizationdollar␣of␣our␣daddiesdollar␣of␣the␣daddiesdouble-double-doubledouble␣standardistsdownward-facing␣dogsdrunk␣and␣disorderlyduck-billed␣dinosaurduodecanucleotidesDurand-Kerner␣methoddysdiadochocinesiadysdiadochokinesiadysdiadochokinesiseverybody␣and␣his␣dogextended␣householdsextended-order␣drill extended␣order␣drillgreat␣dodecahedronsheavy␣as␣a␣dead␣donkeyhidden␣Markov␣modelshide-and-die␣syndromeholding␣midfieldershundred-thousandthshydrazide␣hydrazonehydrogen␣disulphideicosidodecahedronsimidoendopeptidaseindustrial␣diamondsLand␣of␣the␣Red␣Dragonlead␣a␣cat-and-dog␣lifeLedderhose's␣diseaselet's␣not␣and␣say␣we␣didmiddleoftheroaders middle-of-the-roadersmoulded␣cocklebreadnondihydropyridineoldfieldthomasiidsone␣hundred␣thousandpedophilic␣disorderpentadodecahedronspseudodisaccharidered-crested␣pochardsred-shouldered␣hawksreductio␣ad␣absurdumreverse␣implied␣oddsrhombicdodecahedra rhombic␣dodecahedrarhombidodecahedralrhombidodecahedronrhombododecahedralsaddle-billed␣storkssecond-degree␣murderside-blotched␣lizardsodium␣borohydridesstandard␣definitionstandard␣deviationsstandard␣of␣identitystormed␣cats␣and␣dogssulfonodiimidamideSussex␣pond␣puddingsTwaddell␣hydrometertwiddled␣one's␣thumbsunderdevelopednessvalue-added␣networksvideoduodenoscopes

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