operator vs driver

operator and driver both are nouns.

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

As nouns, driver is a hyponym of operator; that is, driver is a word with a more specific, narrower meaning than operator:

operator (noun)	driver (noun)
an agent that operates some apparatus or machine	a golf club (a wood) with a near vertical face that is used for hitting long shots from the tee
someone who owns or operates a business	(computer science) a program that determines how a computer will communicate with a peripheral device
a shrewd or unscrupulous person who knows how to circumvent difficulties	the operator of a motor vehicle
a speculator who trades aggressively on stock or commodity markets	a golfer who hits the golf ball with a driver
(mathematics) a symbol or function representing a mathematical operation	someone who drives animals that pull a vehicle