operating surgeon vs doc

operating surgeon and doc both are nouns.

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

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

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

operating surgeon (noun)	doc (noun)
a physician who specializes in surgery	a licensed medical practitioner