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There are 165 eighteen-letter words containing A, 3C, H, I and O

acceleromyographicaccommodation␣coachaccounting␣machinesanaphylactic␣shocksangioarchitectonicantiechinococcosicantistaphylococcalantistaphylococcicBachelors␣of␣Sciencebichloroacetic␣acidbiocharacteristicsbiochemomechanicalbioelectrochemicalbiophysicochemical bio-physico-chemicalblack␣cuckooshrikes black␣cuckoo-shrikescafeteria␣Catholicscercidiphyllaceouscervicobrachialgiachapter␣of␣accidentscharacter␣encodingscharacteriologicalcharacteristic␣rootcheckbox␣compliancechemical␣castrationchemical␣indicatorschemical␣proteomicschemicotherapeuticchemoarchitectonicchemoarchitecturalchemoarchitectureschemocatalyticallychemocommunicationchemocommunicativechemoprophylacticschitodisaccharideschlorocarbonic␣acidchloroethanoic␣acidchloroplatinic␣acidchlorosulfonic␣acidchlorosulfuric␣acidchlorotetracyclinechlortetracyclinescholangiocarcinomacholescintigraphicChristian␣democracy Christian␣DemocracyChristocentricallychrome-sulfuric␣acidchromocollographicChurch␣Slavonicismsclinical␣psychologyclinicodemographiccoastal␣chinchillascocktail␣sandwichescocrystallographiccollegiate␣churchescombining␣charactercomputer␣techniciancornucopia␣machinescorticohippocampalcorticosubthalamiccosmochronologicalcraniorachischisescraniorachischisiscritical␣race␣theorycryphonectriaceouscyberpsychologicalcybertechnologicalcyclostratigraphiccytoarchitectonicscytoimmunochemicalCzochralski␣processdiarylheterocyclicdichloroacetic␣aciddithiocarbamic␣aciddocosahexenoic␣acidechoendoscopicallyecopsychologicallyecotechnologicallyelectrobiochemicalelectrochromicallyelectromechanicalselectrotechnicallyelectrotechniciansempty␣coaching␣stockexopolysaccharidicfacies␣Hippocraticahard␣science␣fictionhecatonicosachoronHeckman␣correctionshedonistic␣calculushelicobactericidalhepatocarcinogenicheptacosanoic␣acidshexacarboxylic␣acidhippocampocorticalhypercalcificationimmunocitochemicalimmunocytochemicalisochlorogenic␣acidisolithocholic␣acidisosaccharinic␣acidmacroarchitecturalmacrotechnologicalmacrovasculopathicmechanicoreceptorsmechanobiochemicalmechanonociceptionmechanonociceptivemechanonociceptorsmechanoreciprocitymethoxymycolic␣acidmicroarchitecturalmicroarchitectures micro-architecturesmicrofractographicmicrophyllinic␣acidmicrotechnologicalmicrovasculopathicMilankovitch␣cyclesmolecular␣mechanicsmucopolysaccharidemyeloarchitectonicnanoarchitectonicsneochlorogenic␣acidnonadecasaccharidenonelectrochemicalpancreaticohepaticphacomulcificationpharmacoeconomicalpharmacomechanicalphysicochemicalismplatinichloric␣acidplatinochloric␣acidPrince␣of␣Wales␣checkprothoracicotropicprotocatechuic␣acidpro-vice-chancellorspsychoacousticallypsychoacousticianspsychocosmologicalpsychopharmaceuticpsychoprophylacticpsychosociologicalpsychrometric␣chartscratch␣one's␣own␣itch

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 52 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: 22 words
  • German Wiktionary: 7 words
  • Portuguese Wiktionary: 3 words
  • Dutch Wiktionary: 9 words

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