The term 'PEN FOR SWINE' can be solved by the 6-letter word 'PIGSTY'. A PIGSTY is a small enclosure or area of land used to keep pigs. It is typically made of wood, metal, or stone and is used to protect the pigs from the elements and provide them with shelter. Pigs are kept in the PIGSTY until they are ready to be slaughtered or sold. The pen for swine is an important part of pig farming and is essential for the health and well-being of the animals.