Non-progressive is a term that denotes something that is stagnant, unchanging, or outdated. Antonyms, on the other hand, represent words that are diametrically opposite in meaning. The word "progressive," for example, could be considered as an antonym for non-progressive. Progressive refers to something that is innovative, contemporary, and evolving. It suggests a forward-thinking and dynamic approach to problem-solving. Another antonym for non-progressive is "innovative," which implies a willingness to study new ideas and methods. Particular antonyms for non-progressive could be "proactive," "dynamic," "modern," "radical," "revolutionary," "liberal," "open-minded," "reformist," "forward-thinking," and "cutting-edge.