When it comes to the antonyms of the words "theoretical study," practical application, empirical research, and experimental analysis are some of the popular options. The term "practical application" speaks of the process of using theories in real-life situations to achieve specific goals. Empirical research, on the other hand, refers to the investigation of facts and figures through experiments, observations, and tests. It is primarily based on facts and figures, rather than assumptions or theories. Finally, experimental analysis involves analyzing and testing hypotheses through experimentation and research, often referred to as "scientific method." Therefore, while theoretical study relies on concepts and ideas, its antonyms focus on facts, experience, and practical application to solve real-world problems.