Joint-ownership, also known as co-ownership, refers to the state of two or more parties owning the same property or asset. The term is often used in the context of real estate, where multiple individuals may own a house, land, or commercial property. However, there are several antonyms to joint-ownership, including sole ownership, individual ownership, and private ownership. Sole ownership refers to one person owning a piece of property entirely on their own, without any other parties involved. Individual ownership refers to each person owning different shares or portions of a property, while private ownership refers to ownership by a single entity or organization rather than multiple parties.