Quillback is a word used to describe a type of freshwater fish that is known for its spiny and prickly appearance. While the term quillback is commonly used to refer to this fish, there are other synonyms that can be used when discussing this species. Some of these synonyms include spiny ray, arrowhead, and needlefish. These synonyms can be used interchangeably with quillback when discussing the appearance or behavior of this type of fish. Regardless of what term you choose to use, it is important to remember that quillback fish can be found in many freshwater environments throughout North America and are often sought after by anglers for their unique characteristics.