The term "immunosuppressive" refers to the suppression of the immune system's functioning. Synonyms for this term include "immunosuppressant," "immunomodulator," and "immunoregulatory." The use of these synonyms depends on the specific context in which they are used. For example, immunosuppressants are typically medications used to prevent transplant rejection or to treat autoimmune disorders, while immunomodulators may be used to regulate immune response to infectious diseases. Immunoregulatory agents are substances that help regulate the immune response in various situations. Whatever the specific application, all of these terms refer to the manipulation or modulation of the immune system's functions.