There are many different types of fungi that can be considered poisonous or toxic. Some common synonyms for the term "poisonous fungus" include deadly fungi, toxic mushrooms, lethal molds, and venomous spores. These types of fungi can cause a variety of health problems when ingested or inhaled, including organ failure, hallucinations, seizures, and even death in severe cases. It is important to exercise caution when handling or consuming any type of unfamiliar fungi in order to avoid accidental poisoning or illness. If you suspect that you have come into contact with a poisonous fungus, seek medical attention immediately.