veterinarian vs veterinary surgeon

veterinarian and veterinary surgeon both are nouns.

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

As nouns, veterinarian and veterinary surgeon are synonyms defined as:

veterinarian and veterinary surgeon: a doctor who practices veterinary medicine

Other synonyms of veterinarian include vet, veterinary.

veterinarian (noun)	veterinary surgeon (noun)
a doctor who practices veterinary medicine	a doctor who practices veterinary medicine