The phrase "are smitten with" is often used to express a strong infatuation or admiration towards someone or something. But there are several synonyms that can also convey the same emotion. Words like "enchanted", "captivated", "beguiled", "mesmerized", "charmed", "fascinated", "enraptured", "enamoured", and "infatuated" all express an intense interest towards a person, an object, or an idea. Using these synonyms can add depth and variety to one's writing or communication, and can help to portray feelings more accurately. In summary, there are several words that can take the place of "smitten with" and help to express infatuation with more finesse.