livery driver vs cabman

livery driver and cabman both are nouns.

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

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

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

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