Hogpen is a term used to refer to a pen or enclosure for swine. Synonyms for hogpen include pigpen, pigsty, sty, swine barn, pig house, pig enclosure and piggy yard. Each of these terms can be used interchangeably with hogpen to describe an enclosed area where pigs are kept. While some of these terms may be more commonly used in certain regions or settings, they all have the same meaning. When writing about a pig pen, it is important to consider your audience and which word or phrase may be most appropriate to convey your message clearly and effectively.