Class Hexapoda refers to a group of insects that have six legs, which is one of the defining characteristics of this class. However, there are several synonyms for this term that also describe insects with six legs. These include the terms Insecta, Hexapods, and six-legged insects. Insecta is a more general term for insects and includes all species that fit this description, while Hexapods is a more specific term that refers specifically to the six-legged members of the class. Six-legged insects is a more descriptive term that simply specifies the number of legs, which can be useful for scientists who study these creatures. Ultimately, regardless of which term you use, all of them refer to a fascinating group of creatures that make up a significant portion of the Earth's biodiversity.