Hay is an essential item on a farm for feeding livestock during the winter months. And to store hay, a barn is usually built, specifically referred to as a hay barn. However, there are several other synonyms for hay barn, which farmers and other individuals owning large land masses can use. They include hayloft, hayshed, haystack, haymow, and hayrack. All of these words describe a place where hay is stored, and they are interchangeable. The word to use largely depends on the local terminology. Therefore, whether you call it a hayloft, hayshed, or haystack, all of them are appropriate synonyms for hay barn.