headache
See cephalea.
health
We refer to health when your body functions well, you have no disease and thus, feel fit and strong.
heart
The heart is a blood-filled organ of the human body that continues beating throughout our whole lives.
heat stroke
A heat stroke is a sudden rise in body temperature, and especially happens in the summer when you are sunbathing with no protection, or when you do a lot of physical exercise.
hospital
A hospital is a large building where they take care of patients.