The term 'watery eye discharge' is often referred to as rheum, which is a five-letter word. Rheum is a thin, watery discharge from the eyes that can be caused by allergies, infections, or other irritants. It is usually clear or slightly yellow in color and can be accompanied by redness, itching, and burning. Rheum can also be a sign of an underlying medical condition such as conjunctivitis or dry eye syndrome.