telegraph operator vs operator

telegraph operator and operator both are nouns.

Word	Noun	Adjective	Verb	Adverb
telegraph operator	Yes	No	No	No
operator	Yes	No	No	No

As nouns, operator is a hypernym of telegraph operator; that is, operator is a word with a broader meaning than telegraph operator:

Other hypernyms of telegraph operator include manipulator.

telegraph operator (noun)	operator (noun)
someone who transmits messages by telegraph	an agent that operates some apparatus or machine
	someone who owns or operates a business
	a shrewd or unscrupulous person who knows how to circumvent difficulties
	a speculator who trades aggressively on stock or commodity markets
	(mathematics) a symbol or function representing a mathematical operation