The term "screwball" typically refers to something or someone that is unconventional, quirky, or eccentric. When looking for antonyms for "more screwball" one might consider words like "normal," "typical," "conventional," or "ordinary." These antonyms convey a sense of conformity or predictability, which is the opposite of the unpredictable nature of a screwball. Other possible antonyms could include "serious," "stoic," "calm," or "composed," which suggest a lack of the energy, freneticism, or whimsicality that characterizes a screwball. Ultimately, the choice of antonyms will depend on the context in which the term is being used and the specific connotations the writer wishes to evoke.