cabdriver vs cabby

cabdriver and cabby both are nouns.

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

As nouns, cabdriver and cabby are synonyms defined as:

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

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