What is another word for US Post Office?
Pronunciation: [jˌuːˈɛs pˈə͡ʊst ˈɒfɪs] (IPA) 
The United States Postal Service is an institution that has been around since the early days of America. It's an integral part of the country's infrastructure and plays a critical role in the transport of letters and packages, both domestic and international. When looking for synonyms for the US Post Office, it's easy to get confused by the many terms out there. Some of the words that are used include USPS, Postal Service, Post Office, Mail Service, and Postal System. Regardless of the term used, they all refer to the same organization that delivers mail and packages across the country.
