The phrase "hath all to oneself" refers to having exclusive possession of something or having something solely to oneself. Some synonyms for this phrase include having something solely at one's disposal, having something exclusively, having something all to oneself, and having something entirely to oneself. Other possible synonyms include having a monopoly on something, being the only one who possesses something, having something unique, and having something that is one-of-a-kind. Essentially, this phrase represents the idea of possessing something completely and without any interference from others. It can be used in various contexts, including describing someone's possession of a physical object, a personal trait, or even an idea.