Mammoth Uncensored Word List:
44 words ending with ly, 19 letters long

anthropocentrically anthropomorphically centrosymmetrically characterologically chromatographically cinematographically conceptualistically contradistinctively counterproductively crosslinguistically electrobiologically electromagnetically electromechanically electrophoretically exhibitionistically expressionistically extralinguistically histopathologically historiographically hyperdolichocephaly impressionistically individualistically interdepartmentally interferometrically interscholastically microelectronically nonadministratively nonrelativistically nonsubstitutionally overproportionately oversuperstitiously paleogeographically parthenogenetically pharmacodynamically phenomenalistically phytogeographically phytopathologically postdevelopmentally posttranslationally pseudosymmetrically psychooncologically psychotomimetically splanchnoskeletally symptomatologically