Anteclassically is a unique and uncommon word, making it difficult to find direct synonyms. However, we can look for alternatives to convey a similar meaning. Instead of using "anteclassically", one could consider the term "nontraditionally" to describe something that deviates from classical conventions. "Unconventionally" is another option, suggesting a departure from the norm. Additionally, "innovatively" conveys the idea of introducing fresh and new approaches. These synonyms capture the essence of anteclassically by highlighting a departure from traditional or classical norms. Utilizing these words enables us to communicate the same idea while adding variety and nuance to our language.