The word "idiocrasies" refers to the peculiarities, quirks, or peculiar behaviors of an individual that are considered foolish, irrational, or senseless. The antonyms of idiocrasies would be behaviors or actions that are sensible, logical, and rational. Some words that could be used as antonyms for idiocrasies include wisdom, intelligence, common sense, sound judgment, and prudence. Antonyms for idiocrasies refer to actions and behaviors that are logical and purposeful, and not silly or foolish. These antonyms are the qualities that we hope to embody in our daily lives to avoid irrational and nonsensical behavior.