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There are 370 eighteen-letter words containing A, 2C, D, I, O and S

(page 3)

oligosaccharidosisorganoboronic␣acidsosteoradionecroticpachycephalosauridpaedopsychologicalparacoccidioidomasparaconductivitiespeople's␣democraciespericardiocentesespericardiocentesisphacoiridencleisisphenylboronic␣acidsphosphosaccharidespicking␣and␣choosingPlücker␣coordinatespocket␣dictionariespolyhydric␣alcoholspolyphosphoric␣acidprotocycloceratidspseudoanaphylacticpseudoaristocraticpseudocapacitancespseudodisaccharidepseudoisochromaticpseudopsychopathicpsychodermatologicpsychodramaticallypyrophosphoric␣acidquadratic␣functionsradioactive␣tracersradiochromatoscansradioluminescencesradiopacificationsradiospectrometricraffinosaccharidesreductionisticallyribose␣nucleic␣acidsring-tailed␣macaucosrun␣around␣in␣circlessaltwater␣crocodilesarcoendoplasmaticscapulocoracoideumSchwarzschild␣modelScopinaro␣procedurescratching␣one's␣headsecondary␣educationsecondary␣infectionsecond-class␣citizensecond␣conditionalsself-contradictionssilicotungstic␣acidsocialized␣medicinesociodemographicalspecial␣proceedingsspectrodichrographspectroradiometricstaphylococcicidalstencil␣duplicatorsstock␣market␣indicessubarachnoid␣spacessubdolichocephalicsuccinocarboxamidesulfosalicylic␣acidsulphantimonic␣acidsulphindigotic␣acidsulphocarbonic␣acidsulphotungstic␣acidsuperaccommodatingsurgical␣procedurestauroselcholic␣acidthick-and-thin␣blocksthiophosphoric␣acidthreose␣nucleic␣acidtrahisons␣des␣clercstricarboxylic␣acidstriphosphoric␣acidstungstosilicic␣acidunaccomplishednessunderspecificationvectorcardiographsvideodermoscopicalvideolaryngoscopicxylopolysaccharide

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