Lurgy is a colloquial word often used to describe an illness or an infection that makes people feel weak and unwell. Although there is no exact synonym for lurgy, it can be replaced with words like bug, virus, infection, or ailment to describe a condition that is causing discomfort or illness. Some other synonyms for lurgy include malady, disease, sickness, and affliction. These words can be used to describe any type of illness or condition, whether mild or severe. In summary, using synonyms for lurgy can add variety and depth to your writing and help convey the exact meaning you want to convey.