houseman vs physician

houseman and physician both are nouns.

Word	Noun	Adjective	Verb	Adverb
houseman	Yes	No	No	No
physician	Yes	No	No	No

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

houseman: an advanced student or graduate in medicine gaining supervised practical experience
physician: a licensed medical practitioner

Other hypernyms of houseman include doc, doctor, Dr., MD, medico.

houseman (noun)	physician (noun)
an advanced student or graduate in medicine gaining supervised practical experience	a licensed medical practitioner