"Do-nothingnesses" is a word that describes a lack of action or accomplishment, and its antonyms would be words that describe activity or productivity. Some potential antonyms might include diligence, productivity, progressiveness, go-getting, industriousness, action-oriented, and energy. These antonyms all imply a willingness to take action and make progress, which is the opposite of the passive inaction described by "do-nothingnesses." While there is value in relaxation and taking breaks, it's important to balance that with a sense of purpose and drive in order to achieve personal and professional goals.