Yes, sows are tolerant of each other, and can be penned together if adequate room is given for feeding, sleeping, and bathroom activities, since swine like to keep a clean pen.
A boar is a male pig that has never been castrated. A barrow is a male that has been castrated. A sow is a female pig that has had at least 1 litter of piglets. A female that has never had a litter...