Yellow Cab is a well-known term often associated with taxi services. However, there are various synonyms for it such as taxi, cab, hack, taxicab, hansom, and more. These synonyms come from both formal and informal vocabulary to describe the same type of vehicle service. "Cab" and "taxi" are the most common colloquial terms used to refer to a vehicle for hire, while "hansom" refers to the horse-drawn carriages used in the past. "Hack" is an older term used mainly in New York for a taxi or cab, while "taxicab" is a more formal term used in legal and administrative contexts. Regardless of the word used, they all describe the same service, providing transport for hire to passengers who need to get from one place to another.