Invertebrate zoology is the study of animals that do not have backbones. However, there are several synonyms that can be used to refer to this field of study. One synonym is non-vertebrate zoology, which emphasizes the absence of a vertebral column. Another synonym is spineless zoology, which highlights the lack of spines in these animals. Another synonym is invertebrate biology, which encompasses the entire range of biological aspects of these animals, including their classification, anatomy, behavior, and ecology. Finally, another synonym is invertology, which is a more colloquial term that is often used by science enthusiasts and hobbyists. Regardless of the synonym used, invertebrate zoology is an important field of study that sheds light on the fascinating diversity of life on Earth.