The Merrimack River is a well-known waterway that stretches through the northeastern region of the United States. This mighty river is a popular spot for fishing, boating and other recreational activities. While many people refer to it as the Merrimack River, there are also numerous synonyms that can be used to describe this majestic river. Some of the popular synonyms include Merrimack, Merrimac, Meremac, and Meramec. These names have been used interchangeably over the years, and each one conveys a sense of history and beauty. Regardless of what you call it, the Merrimack River is a treasure of the Northeast and a must-visit spot for both locals and tourists.