The term "dorsals" is commonly used in the context of biology and refers to the fins on the back of a fish or aquatic animal. However, there are several other words that can be used as synonyms for this term. Some of these include dorsal fins, back fins, spine fins, and back appendages. Other related terms may include caudal fins, pectoral fins, and anal fins, which are all types of fins found on various parts of a fish's body. The use of proper synonyms is important for clear communication and avoiding confusion when discussing the anatomy and behavior of aquatic animals.