The word "soman" has a few synonyms depending on the context it is used in. If it is used in botany, it can be referred to as a creeping or climbing plant. In chemistry, it is commonly known as a nerve gas or a type of chemical warfare agent. Some synonyms for soman in this context could be "nerve agent," "toxic gas," or "chemical weapon." Additionally, as soman is a specific type of nerve agent, it could be referred to more specifically as "organophosphate nerve agent" or "OPNA." Overall, the synonyms for soman depend on the field and context in which it is being discussed.