Antonyms for the word "more innoxious" include hazardous, harmful, dangerous, toxic, poisonous, injurious, and noxious. These words describe things that can cause harm, injury, or even death to living beings. Examples of hazardous substances include radioactive materials, toxic chemicals, and dangerous drugs. Harmful activities may include smoking, excessive drinking, and reckless driving. Noxious gases, such as carbon monoxide and sulfur dioxide, can have a severe impact on the environment and human health. Overall, while "more innoxious" suggests something that is free from harm, its antonyms describe situations that can be serious threats to well-being.