If you're looking for synonyms for "well-appointed", there are plenty of words that can convey a similar meaning. "Luxurious" is one option, as it suggests a high level of comfort and elegance. "Opulent" and "lavish" imply extravagance and abundance, while "plush" and "sumptuous" focus more on the softness and quality of materials. "Sophisticated", "elegant", and "stylish" all suggest a refinement and attention to detail. "Well-furnished", "well-equipped", and "well-stocked" emphasize the completeness and convenience of a space or place. Other options include "high-end", "premium", "top-of-the-line", and "impeccable".