cabman vs cabdriver

cabman and cabdriver both are nouns.

Word	Noun	Adjective	Verb	Adverb
cabman	Yes	No	No	No
cabdriver	Yes	No	No	No

As nouns, cabman and cabdriver are synonyms defined as:

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

cabman (noun)	cabdriver (noun)
someone who drives a taxi for a living	someone who drives a taxi for a living