illness; disease; ailment (an abnormal medical condition) / illness; disease (a state of bad health) / illness; disease (abnormal condition or attitude)

coeliac disease (auto-immune disease characterised by sensitivity of the lining of the small intestine to gluten)

(pathology) venereal disease (contagious disease spread through sexual intercourse)

(neurology, pathology) Alzheimer's disease (neurodegenerative disease causing dementia)

(neurology, pathology) Parkinson's disease

(pathology) sexually transmitted disease (disease contracted through sexual contact)

Newcastle disease (disease of poultry)

decompression sickness (condition resulting from the formation of nitrogen bubbles in the blood)

(pathology) Chagas' disease (form of trypanosomiasis prevalent in South America)

(pathology) Addison's disease (a disorder in which the adrenal glands fail to produce a sufficient quantity of steroids)