driver vs chauffeur

driver and chauffeur both are nouns.

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

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

driver (noun)	chauffeur (noun)
a golf club (a wood) with a near vertical face that is used for hitting long shots from the tee	a person paid to drive a privately owned car
(computer science) a program that determines how a computer will communicate with a peripheral device
the operator of a motor vehicle
a golfer who hits the golf ball with a driver
someone who drives animals that pull a vehicle

driver (verb)	chauffeur (verb)
	drive someone in a vehicle