The word "demoniacs" refers to people who are believed to be possessed by demons, and therefore it is a powerful and strong word. However, there are many antonyms for this term that can be used to describe people who have no connection to such beliefs or practices. Some of the words that can be used as antonyms for demoniacs are rationalists, skeptics, and atheists, among others. Rationalists are people who rely on reason and logic, while skeptics are those who doubt or question claims that are made without proof. Finally, atheists do not believe in the existence of God or any other supernatural beings, which makes them the complete opposite of demoniacs.