| Term | Definition |
| hyperacidity | excessive acidity |
| hyperglycemia | excess of sugar in the blood |
| hypertension | abnormally high blood pressure |
| hyperthermia | expecially high fever; hyperpyrexia |
| hyperthyroid | marked by excessive activity of the thyroid gland |
| hyperactive | overactive |
| hyperbole | extravagant exaggeration of statement |
| hypercritical | overcritical |
| hyperemia | superabundance of blood |
| hyperopia | farsightedness |
| hypersensitive | excessively sensitive; supersensitive |
| hypertrophy | excessive growth or development, as of a body part |