The term "active open" refers to a state in which a device or system is actively connected and communicating with another device or system. There are several other terms that can be used to describe this state, including "live connection," "established link," "ongoing communication," "operational link," and "functional connection." These synonyms can be used interchangeably in technical discussions to describe the status of a network, server, or other system that is currently in use and functioning properly. The use of these synonyms can help to make technical discussions more clear and efficient, as they provide a quick and accurate way to describe the status of a complex system.