The term "poison bush" is often used to describe a type of potentially dangerous plant. However, there are other terms and synonyms that can be used to describe these types of plants. Some of these include toxic bush, poisonous shrub, venomous flora, and harmful vegetation. These terms are all used to describe plants that can cause harm or sickness to humans or animals. It is important to know the specific type of plant that is being referred to and to exercise caution when encountering any unknown plants in the wild. Seeking the advice of an expert or trained professional is advised.