9-letter words containing a, x
- xerostoma — an abnormal lack of saliva, dryness of the mouth
- xianggang — Hong Kong.
- xiphoidal — shaped like a sword
- xiphopagi — Siamese twins joined at the lower sternum
- xuan zang — 602–664 ad, Chinese Buddhist monk, who travelled to India to study the Buddhist scriptures, many of which he translated into Chinese: noted also for his account of his travels
- xuan zong — 685–762 ad, Chinese emperor (712–56) of the Tang dynasty
- xylem ray — a transverse sheet of soft, living cells wholly within the wood or xylem and extending from the pith of a stem to the phloem
- xylocaine — lidocaine, often used as a local anesthetic by dentists and plastic surgeons
- xylograph — An engraving in wood, especially one used for printing.
- xylomancy — Divination by means of pieces of burning wood.
- xylophage — any insect or organism that eats wood
- xylorimba — A pitched percussion instrument corresponding to a xylophone with an extended range.
- yaxchilan — the ruins of an ancient Mayan city, in Chiapas state, Mexico, famous for its many carved lintels depicting ceremonial and military scenes.