Suborder Zygoptera is a scientific term used to describe a group of insects commonly known as damselflies. However, there are several synonyms for this term that are also used interchangeably. These include: 1. Superfamily Coenagrionoidea 2. Infraorder Epiprocta 3. Suborder Agrionoptera 4. Order Odonata Each of these terms refers to the same group of insects and is used in different contexts. For instance, the term 'Order Odonata' is used when referring to all insects that belong to the same order as damselflies, while 'Suborder Agrionoptera' is more specific and refers only to damselflies. Regardless of the synonyms used, the importance of studying these fascinating insects remains the same.