The word "un-happinesses" isn't a standard word in the English language, and therefore it doesn't have any antonyms. However, we can consider the meaning of "un-happinesses" as being the opposite of happiness or the absence of joy. In this sense, we can suggest antonyms such as joy, contentment, satisfaction, happiness, pleasure, delight, and well-being. These are just a few examples of words that can be used to describe the opposite of "un-happinesses." In essence, the antonyms for "un-happinesses" simply overlap with words that express positive emotions or experiences.