Feyness refers to a mystical quality or that which is otherworldly. Some synonyms for feyness include ethereal, otherworldly, supernatural, phantasmal, ghostly, eldritch, eerie, and mystical. Each of these words connotes an element of the supernatural; they all describe something that is beyond the realm of our everyday experience. Ethereal and mystical are perhaps the most commonly used of these words, while eerie and ghostly suggest something more sinister. Eldritch and phantasmal have a darker and more mysterious connotation, while supernatural and otherworldly emphasize the idea of something that transcends the natural world. Overall, these synonyms help to convey the sense of enchantment and magic that is often associated with feyness.