While "convenances" typically refers to social customs and proper behavior, its antonyms can encompass a variety of attitudes and actions. One antonym could be "nonconformity," implying a lack of adherence to social norms or expectations. Another could be "disrespect," suggesting a disregard for the accepted rules of conduct. "Rudeness" or "insensitivity" could also be considered antonyms, indicating a lack of consideration for the feelings and needs of others. However, it is worth noting that antonyms are not necessarily mutually exclusive, and certain behaviors may fall into multiple categories depending on the situation and context.