"VESD" stands for "very early smoke detection," and refers to a type of fire detection system that utilizes high sensitivity smoke detectors to detect smoke early on in a fire. When looking for synonyms for "VESD," one could consider the terms "early warning smoke detection," "advanced smoke detection," or "ultra-sensitive smoke detection." Other related phrases might include "early smoke detection and alarm systems," "high sensitivity smoke alarms," or "intelligent smoke detection" systems. These terms all convey the idea of detecting smoke at an early stage in order to provide rapid notification and response to a potential fire, which can be critical in preventing property damage and saving lives.