Psycheism, a term coined by Wilhelm Wundt, refers to the study and theory of the mind and consciousness. However, when it comes to antonyms for the word psycheism, it becomes a bit challenging. Since psycheism is a unique and specific term, it is not easy to find a direct opposite for it. However, one can consider terms such as materialism, behaviorism, and functionalism, which represent different perspectives on the study of the mind and consciousness. Materialism focuses on the physical properties of the brain, behaviorism emphasizes the study of observable behavior, and functionalism explores the practical roles of the mind in daily life. These terms can be considered as antonyms for psycheism, albeit not direct opposites.