race driver vs automobile driver

race driver and automobile driver both are nouns.

Word	Noun	Adjective	Verb	Adverb
race driver	Yes	No	No	No
automobile driver	Yes	No	No	No

As nouns, race driver and automobile driver are synonyms defined as:

race driver and automobile driver: someone who drives racing cars at high speeds

Other synonyms of race driver include racer.

race driver (noun)	automobile driver (noun)
someone who drives racing cars at high speeds	someone who drives racing cars at high speeds