Plant order refers to the taxonomic classification level between class and family. There are several synonyms for this term that are commonly used in botany and biology. These include plant group, plant division, plant class, plant arrangement, and plant taxonomy. All of these terms refer to the hierarchical system of identifying and categorizing plant species based on their physical and genetic characteristics. The use of plant order or its synonyms is important in scientific research, conservation efforts, and agriculture as it provides a standardized framework for communicating and comparing data and information about plants across different regions and disciplines.