Mammoth Uncensored Word List:
21 words ending with ne, 17 letters long

alkyilcycloalkene australopithecine chloronaphthalene chlortetracycline cryptocrystalline cyclododecatriene cyclooctatetraene dextroamphetamine dihydroergotamine dimethylhydrazine hydroxytryptamine methylamphetamine methylcyclobutane methylcyclobutene methylcyclohexane methylcyclohexene methylnaphthalene monochlorobenzene perchloroethylene taphrogeosyncline trichloroethylene