pharmaceutical vs medicament

pharmaceutical and medicament both are nouns.

Word	Noun	Adjective	Verb	Adverb
pharmaceutical	Yes	Yes	No	No
medicament	Yes	No	No	No

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

pharmaceutical: drug or medicine that is prepared or dispensed in pharmacies and used in medical treatment
medicament: (medicine) something that treats or prevents or alleviates the symptoms of disease

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

pharmaceutical (noun)	medicament (noun)
drug or medicine that is prepared or dispensed in pharmacies and used in medical treatment	(medicine) something that treats or prevents or alleviates the symptoms of disease

pharmaceutical (adjective)	medicament (adjective)
of or relating to pharmacy or pharmacists
of or relating to drugs used in medical treatment