An ill person is someone who is suffering from a physical or mental illness. An INVALID is someone who is unable to work or take part in normal activities due to a physical or mental disability. A PATIENT is someone who is receiving medical treatment for an illness or injury. A SUFFERER is someone who is enduring pain, distress, or hardship. A CASE is a particular instance of a disease or injury. A CRIPPLE is someone who is disabled or partially disabled due to an injury or illness. A WEAKLING is someone who is physically or mentally weak.