rubefacient vs medicament

rubefacient and medicament both are nouns.

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

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

rubefacient: a medicine for external application that produces redness of the skin
medicament: (medicine) something that treats or prevents or alleviates the symptoms of disease

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

rubefacient (noun)	medicament (noun)
a medicine for external application that produces redness of the skin	(medicine) something that treats or prevents or alleviates the symptoms of disease