radio operator vs operator

radio operator and operator both are nouns.

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

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

Other hypernyms of radio operator include manipulator.

radio operator (noun)	operator (noun)
someone who operates a radio transmitter	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