immunosuppressive drug vs immunosuppressant

immunosuppressive drug and immunosuppressant both are nouns.

Word	Noun	Adjective	Verb	Adverb
immunosuppressive drug	Yes	No	No	No
immunosuppressant	Yes	No	No	No

As nouns, immunosuppressive drug and immunosuppressant are synonyms defined as:

immunosuppressive drug and immunosuppressant: a drug that lowers the body's normal immune response

Other synonyms of immunosuppressive drug include immune suppressant drug, immunosuppressive, immunosuppressor.

immunosuppressive drug (noun)	immunosuppressant (noun)
a drug that lowers the body's normal immune response	a drug that lowers the body's normal immune response