medical intern vs MD

medical intern and MD both are nouns.

Word	Noun	Adjective	Verb	Adverb
medical intern	Yes	No	No	No
MD	Yes	No	No	No

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

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

Other hypernyms of medical intern include doc, doctor, Dr., medico, physician.

medical intern (noun)	MD (noun)
an advanced student or graduate in medicine gaining supervised practical experience	a doctor's degree in medicine
	a Mid-Atlantic state; one of the original 13 colonies, with capital Annapolis
	a licensed medical practitioner