Merchant marine is a term that refers to the commercial fleet of ships that transport cargo and passengers. There are several synonyms for the term that can be used interchangeably in different contexts. Examples include shipping industry, commercial shipping, seafaring, maritime trade, oceanic transportation, and marine commerce. The merchant marine has played a critical role in global trade and has contributed immensely to the global economy. Synonyms for the term are an essential part of communication and must be used appropriately to give a clear understanding of the context in which they are being used.