The USN, short for United States Navy, is a popular term used to refer to the naval branch of the United States Armed Forces. However, there are several synonyms that one can use to describe the same entity. For instance, one can use the title "U.S. Navy" instead of USN. Other synonyms include the American Navy, the United States maritime force, the US sea power, the naval branch of the US military, and the US naval forces. Regardless of the synonym used, all of these terms are used interchangeably to refer to the United States Navy and its esteemed contributions to the nation.