switchboard operator vs telephone operator

switchboard operator and telephone operator both are nouns.

Word	Noun	Adjective	Verb	Adverb
switchboard operator	Yes	No	No	No
telephone operator	Yes	No	No	No

As nouns, switchboard operator and telephone operator are synonyms defined as:

switchboard operator and telephone operator: someone who helps callers get the person they are calling

Other synonyms of switchboard operator include telephonist.

switchboard operator (noun)	telephone operator (noun)
someone who helps callers get the person they are calling	someone who helps callers get the person they are calling