veterinary surgeon vs MD

veterinary surgeon and MD both are nouns.

Word	Noun	Adjective	Verb	Adverb
veterinary surgeon	Yes	No	No	No
MD	Yes	No	No	No

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

Other hypernyms of veterinary surgeon include doc, doctor, Dr., medico, physician.

veterinary surgeon (noun)	MD (noun)
a doctor who practices veterinary medicine	a doctor's degree in medicine
	a Mid-Atlantic state; one of the original 13 colonies, with capital Annapolis
	a licensed medical practitioner