sawbones vs operating surgeon

sawbones and operating surgeon both are nouns.

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

As nouns, sawbones and operating surgeon are synonyms defined as:

Other synonyms of sawbones include surgeon.

sawbones (noun)	operating surgeon (noun)
a physician who specializes in surgery	a physician who specializes in surgery