The antonyms for the word "weirdnesses" can be any term that denotes normality, conventionality, or conformity. Such antonyms can include terms like regularity, predictability, conformity, normalcy, sanity, and conventionality. All of these words indicate the opposite of the unusual, strange, or abnormal behavior that is implied by the term "weirdnesses." While weirdnesses are interesting and intriguing, they are often viewed as oddities or anomalies in everyday life. On the other hand, antonyms like regularity, predictability, and conventionality imply order, stability, and consistency, which are often seen as desirable traits in society.