cytotoxic drug vs medicament

cytotoxic drug and medicament both are nouns.

Word	Noun	Adjective	Verb	Adverb
cytotoxic drug	Yes	No	No	No
medicament	Yes	No	No	No

As nouns, medicament is a hypernym of cytotoxic drug; that is, medicament is a word with a broader meaning than cytotoxic drug:

cytotoxic drug: any drug that has a toxic effect on cells; commonly used in chemotherapy to inhibit the proliferation of cancerous cells
medicament: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of cytotoxic drug include medication, medicinal drug, medicine.

cytotoxic drug (noun)	medicament (noun)
any drug that has a toxic effect on cells; commonly used in chemotherapy to inhibit the proliferation of cancerous cells	(medicine) something that treats or prevents or alleviates the symptoms of disease