veterinarian vs doc

veterinarian and doc both are nouns.

Word	Noun	Adjective	Verb	Adverb
veterinarian	Yes	No	No	No
doc	Yes	No	No	No

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

Other hypernyms of veterinarian include doctor, Dr., MD, medico, physician.

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