The word "hearg" has a few synonyms that can be used to describe a place of worship. One of them is "shrine," which refers to a sacred place dedicated to a particular deity or saint. Another synonym is "temple," which is a structure used for religious purposes, like worship, prayer, or sacrifice. A "sanctuary" is another word that can be used for a hearg, as it suggests a safe and sacred space, often reserved for religious activities. Finally, a "chapel" is a smaller hearg, often associated with a particular religious institution or community. Each of these synonyms can be used to refer to a place of worship, depending on the context and culture in which they are used.