cab vs taxicab

cab and taxicab both are nouns.

Word	Noun	Adjective	Verb	Adverb
cab	Yes	No	Yes	No
taxicab	Yes	No	No	No

As nouns, cab and taxicab are synonyms defined as:

cab and taxicab: a car driven by a person whose job is to take passengers where they want to go in exchange for money

Other synonyms of cab include hack, taxi.

cab (noun)	taxicab (noun)
a car driven by a person whose job is to take passengers where they want to go in exchange for money	a car driven by a person whose job is to take passengers where they want to go in exchange for money
small two-wheeled horse-drawn carriage; with two seats and a folding hood
a compartment at the front of a motor vehicle or locomotive where driver sits

cab (verb)	taxicab (verb)
ride in a taxicab