cabdriver vs livery driver

cabdriver and livery driver both are nouns.

Word	Noun	Adjective	Verb	Adverb
cabdriver	Yes	No	No	No
livery driver	Yes	No	No	No

As nouns, cabdriver and livery driver are synonyms defined as:

Other synonyms of cabdriver include cabby, cabman, hack-driver, hack driver, taxidriver, taximan.

cabdriver (noun)	livery driver (noun)
someone who drives a taxi for a living	someone who drives a taxi for a living