Mammoth Uncensored Word List:
20 - 19 letter words starting with ch

characterologically chemicophysiologies chemicophysiologist chemostratigraphers chemostratigraphics chemostratigraphist chlorofluorocarbons chlorofluoromethane cholangiocarcinomas cholecystocolostomy cholecystocutaneous cholecystoileostomy cholecystolithiasis choledocholithiasis chromatographically chromolithographers chromolithographies chromolithographing chronostratigrapher chronostratigraphic