driver vs honker

driver and honker both are nouns.

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

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

driver (noun)	honker (noun)
a golf club (a wood) with a near vertical face that is used for hitting long shots from the tee	common greyish-brown wild goose of North America with a loud, trumpeting call
(computer science) a program that determines how a computer will communicate with a peripheral device	informal terms for the nose
the operator of a motor vehicle	a driver who causes his car's horn to make a loud honking sound
a golfer who hits the golf ball with a driver
someone who drives animals that pull a vehicle