* Pen: This is the most common term for a confined space where pigs are kept. It can be a small enclosure for a single pig or a large area for many.
* Sty: This term is often used for a more traditional, enclosed pig dwelling, often built with wood and having a roof.
* Barn: A larger structure that may house pigs along with other livestock.
* Herd: This refers to a group of pigs, not a specific place.
* Farm: This is a general term for a piece of land where pigs are raised.
The specific name used will depend on the context and the type of housing the pig is in.