Immune failure is a condition where the body's immune system is unable to protect the body against infections and diseases. There are various synonyms for immune failure, including immunodeficiency, immune deficiency, immunosuppression, and immune incompetence. Immunodeficiency refers to a deficiency in the immune system where it fails to respond to infections. Immune deficiency, on the other hand, is a systemic failure of the immune system to respond to antigens. Immunosuppression is the suppression of the immune system, which may occur due to various reasons such as medication or disease. Immune incompetence refers to the inability of the immune system to protect the body from infections. All these terms are synonymous with immune failure, which may have varied causes and effects on the body.