cab vs minicab

cab and minicab both are nouns.

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

As nouns, minicab is a hyponym of cab; that is, minicab is a word with a more specific, narrower meaning than cab:

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

Other hyponyms of cab include gypsy cab.

cab (noun)	minicab (noun)
a car driven by a person whose job is to take passengers where they want to go in exchange for money	a minicar used as a taxicab
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)	minicab (verb)
ride in a taxicab