13-letter words containing h, a, k, e, m
- thomas hooker — Joseph, 1814–79, Union general in the U.S. Civil War.
- thrombokinase — Biochemistry. a lipoprotein in the blood that converts prothrombin to thrombin.
- water hemlock — any of several poisonous plants belonging to the genus Cicuta, of the parsley family, as C. virosa of Europe, and C. maculata of North America, growing in swamps and marshy places.