veterinary surgeon vs doc

veterinary surgeon and doc both are nouns.

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

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

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

veterinary surgeon (noun)	doc (noun)
a doctor who practices veterinary medicine	a licensed medical practitioner