Fancily is a versatile word with a variety of possible synonyms. Some options include elaborately, ornately, opulently, plushly, luxuriously, lavishly, exquisitely, and sumptuously. Each of these words conveys a sense of extravagance and abundance, making them ideal choices for describing things that are richly adorned or lavishly appointed. Other possible synonyms for fancily might include grandiosely, ostentatiously, showily, and flamboyantly, each of which conveys a distinctive sense of flamboyance and excess. Ultimately, the choice of synonym will depend on the context in which the word is being used and the specific connotations that the writer wishes to convey.