The phrase "have all to oneself" means to possess or control something exclusively, without any sharing or interference from others. There are a number of synonyms that can be used to express this idea, such as "commandeer," "monopolize," "appropriate," "sequester," "exclusively possess," and "take over." Other alternatives include "hog," "dominate," "take control of," "claim possession of," and "keep to oneself." These words are particularly useful when expressing the desire to keep something entirely for oneself, whether it be a physical object or a piece of time or space. They also highlight one's authority or power over the object or area in question.