Nonmental is a term used to describe something that is not related to the mind or intellect. The antonyms of nonmental would, therefore, be words that describe things that are related to the mind or intellectual processes. Some antonyms of nonmental include intellectual, cognitive, cerebral, mental, rational, and thoughtful. These words are used to describe processes related to thinking and problem-solving, as well as the use of logic and reasoning. By contrast, nonmental terms would describe things that are physical or tangible, such as objects, events, or sensations. Antonyms are closely related to synonyms, as they help to expand our vocabulary and provide a more nuanced understanding of language.