| Xenomorph | Xénomorphe |
| xenon | xénon |
| Xenopeltidae | Xenopeltidae |
| Xenopeltis unicolor | Xenopeltidae |
| Xenophanes | Xénophane de Colophon |
| xenophilia | xénophilie |
| xenophobe | xénophobe |
| xenophobia | xénophobie |
| xenophobic | xénophobe |
| Xenophon | Xénophon |
| Xenophon Zolotas | Xenophón Zolótas |
| Xenophontos monastery | Monastère de Xenofontos |
| Xenopus | Xénope |
| Xenosauridae | Xenosauridae |
| xenotransplantation | xénogreffe |
| Xenu | Xenu |
| Xeon | Intel Xeon |
| Xeraco | Xeraco |
| Xeres | Circuit Permanent de Jerez |
| Xeresa | Xeresa |
| Xerez CD | Xerez Club Deportivo |
| Xero | Xero |
| xerography | xérographie |
| xerophthalmia | xérophtalmie |
| Xerophyllum tenax | Xerophyllum tenax |
| Xerosis | Sécheresse |
| xerox | photocopier |
| Xerox Alto | Xerox Alto |
| xerox copy | xérocopie |
| Xert | Xert |
| Xerta | Xerta |
| Xerxes | Xerxès |
| Xerxes I of Persia | Xerxès Ier |
| Xerxes II of Persia | Xerxès II |
| Xfce | Xfce |
| XFX | PINE Technology |
| XGA | Extended Graphics Array |
| Xgl | Xgl |
| Xhosa | xhosa |
| Xhosa language | Xhosa |
| XHTML | XHTML |
| XHTML Friends Network | XHTML Friends Network |
| xi | xi |
| Xi Andromedae | Xi Andromedae |
| Xi particle | Baryon xi |
| Xia | Dynastie Xia |
| Xia Dynasty | Dynastie Xia |
| Xiamen | Xiamen |
| Xian | Xian |
| Xianbei | Xianbei |
| Xianfeng Emperor | Xianfeng |
| Xiangfan | Xiangfan |
| Xiangkhoang Province | Province de Xieng Khuang |
| xiangqi | xiangqi |
| Xiangtan | Xiangtan |
| Xianyang | Xianyang |
| Xiao Xiao | XiaoXiao |
| Xiazhi | Solstice |
| Xibalba | Xibalba |
| Xibe | Xibe |
| Xicheng District | District de Xicheng |
| Xie Jun | Xie Jun |
| Xie Xingfang | Xie Xingfang |
| Xigazê Prefecture | Préfecture de Xigazê |
| Xijiang River | Xi Jiang |
| Xilin Gol League | Ligue de Xilin Gol |
| Xilinhot | Xilinhot |
| Xin Dynasty | Dynastie Xin |
| Xingu | Xingu |
| Xingu River | Rio Xingu |
| Xingyiquan | Xingyi quan |
| Xinhua News Agency | Xinhua |
| Xining | Xining |
| Xinjiang | Xinjiang |
| Xinmin Evening News | Xinmin Evening News |
| Xinyang | Xinyang |
| Xinzhou | Xinzhou |
| Xinzo de Limia | Xinzo de Limia |
| Xiongnu | Xiongnu |
| Xipe Totec | Xipe Totec |
| Xiphos | Xiphos |
