telephone operator vs switchboard operator

telephone operator and switchboard operator both are nouns.

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

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

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

Other synonyms of telephone operator include telephonist.

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