physician vs medical man

physician and medical man both are nouns.

Word	Noun	Adjective	Verb	Adverb
physician	Yes	No	No	No
medical man	Yes	No	No	No

As nouns, medical man is a hypernym of physician; that is, medical man is a word with a broader meaning than physician:

Other hypernyms of physician include medical practitioner.

physician (noun)	medical man (noun)
a licensed medical practitioner	someone who practices medicine