Malady
Part of speech: noun
Definition: Any ailment or disease of the human body; especially, a lingering or deep-seated disorder. A moral or mental defect or disorder.
Sickness
Part of speech: noun
Definition: The quality or state of being sick or diseased; illness; disease or malady.Nausea; qualmishness; as, sickness of stomach.
Example sentence: I don't know why you call it morning sickness, because I was sick all day and night!