| Xerxes | Xerxes |
| Xerxes I da Pérsia | Xerxes I of Persia |
| Xerxes II da Pérsia | Xerxes II of Persia |
| Xfce | Xfce |
| XGI Technology | XGI Technology |
| Xgl | Xgl |
| xhosa | Xhosa |
| XHTML Friends Network | XHTML Friends Network |
| xi | xi |
| Xi Aquarii | Xi Aquarii |
| XI dinastia egípcia | Eleventh dynasty of Egypt |
| Xi Draconis | Xi Draconis |
| Xi Shun | Bao Xishun |
| Xi Xia | Western Xia |
| Xiamen | Xiamen |
| Xianfeng | Xianfeng Emperor |
| Xianyang | Xianyang |
| Xiaolin Showdown | Xiaolin Showdown |
| XiChona | Shona language |
| Xieng Khouang | Xiangkhoang Province |
| XII dinastia egípcia | Twelfth dynasty of Egypt |
| XIII dinastia egípcia | Thirteenth dynasty of Egypt |
| xiismo | Shi'a |
| xiita | bigot |
| xilema | xylem |
| xileno | xylene |
| xilindró | jug |
| xilitol | xylitol |
| xilofone | xylophone |
| xilografia | xylography |
| Xilogravura | Wood-engraving |
| xilose | xylose |
| Ximango | Chimango Caracara |
| Xindi | Xindi |
| xingamento | curse |
| xingar | abuse |
| Xinjiang | Xinjiang |
| Xintoísmo | Shinto |
| Xinzo de Limia | Xinzo de Limia |
| Xipe Totec | Xipe Totec |
| Xiphophorus hellerii | Green swordtail |
| Xiraz | Shiraz |
| Xirivella | Xirivella |
| xis | burger |
| xisto | schist |
| Xisto betuminoso | Bituminous shale |
| Xiuhcoatl | Xiuhcoatl |
| Xiuhtecuhtli | Xiuhtecuhtli |
| XIV dinastia egípcia | Fourteenth dynasty of Egypt |
| Xiva | Shiva |
| XiVenda | Venda language |
| XIX dinastia egípcia | Nineteenth dynasty of Egypt |
| XL | XL |
| XL Recordings | XL Recordings |
| XMI | XML Metadata Interchange |
| XML | XML |
| XML Schema | XML Schema |
| XMLHttpRequest | XMLHttpRequest |
| XMMS | XMMS |
| XO | One Laptop per Child |
| Xochipilli | Xochipilli |
| Xochiquetzal | Xochiquetzal |
| Xocotl | Xocotl |
| Xofrango | Osprey |
| Xogum | Shogun |
| xogunato | shogunate |
| Xogunato Tokugawa | Tokugawa shogunate |
| Xolotl | Xolotl |
