Mammoth Uncensored Word List:
19 words ending with d, 18 letters long

cholecystectomized chromolithographed constitutionalized dehydrochlorinated hypersophisticated immunoprecipitated nondimensionalised nondimensionalized overcommercialized overindustrialized overprocrastinated overproportionated photodisintegrated quadringentilliard quattuordecilliard quinquagintilliard strawberryflavored supersophisticated ultrasophisticated