| xadrez | checked |
| Xadrez atómico | Atomic chess |
| Xadrez de Capablanca | Capablanca chess |
| Xadrez Gótico | Gothic Chess |
| Xadrez hexagonal de Glinski | Hexagonal chess |
| xadrezista | chess player |
| Xai-Xai | Xai-Xai |
| xaile | shawl |
| xairel | saddlecloth |
| xale | shawl |
| Xamanismo | Shamanism |
| XAML | Extensible Application Markup Language |
| xampu | shampoo |
| xamã | witch doctor |
| xana | cunt |
| Xanadu | Xanadu |
| Xanana Gusmão | Xanana Gusmão |
| Xandrianismo | Alexandrian Wicca |
| Xandros | Xandros |
| Xangai | Shanghai |
| Xangrilá | Shangri-La |
| Xangô | Shango |
| Xanthi | Xanthi Prefecture |
| Xanthoceras | Xanthoceras |
| Xanthosoma | Xanthosoma |
| xantina | xanthine |
| Xantos e Bálios | Balius and Xanthus |
| xantungue | shantung |
| Xaque | Abortion |
| xarife | shereef |
| Xariá | Sharia |
| xaroco | sirocco |
| xarope | syrup |
| xarope de bordo | maple syrup |
| xarope de groselha | grenadine |
| Xatria | Kshatriya |
| xavante | Xavánte |
| Xavier | Xavier |
| Xavier Hernández Creus | Xavi |
| Xavier Sala i Martín | Xavier Sala-i-Martin |
| XBoard | XBoard |
| Xbox Live Vision | Xbox Live Vision |
| XD-Picture Card | XD-Picture Card |
| XDR | External Data Representation |
| xeique | sheik |
| xelim | shilling |
| Xelim tanzaniano | Tanzanian shilling |
| Xen | Xen |
| Xena | Xena |
| Xenarthra | Xenarthra |
| Xenisthmidae | Xenisthmidae |
| Xenix | Xenix |
| Xenoclarias eupogon | Lake Victoria deepwater catfish |
| xenofobia | xenophobia |
| Xenofonte | Xenophon |
| xenofóbico | xenophobic |
| Xenofón Zolótas | Xenophon Zolotas |
| Xenoglaux loweryi | Long-whiskered Owlet |
| Xenoglossia | Xenoglossy |
| Xenomorfo | Xenomorph |
| Xenopeltidae | Xenopeltidae |
| Xenopus laevis | African clawed frog |
| Xenosauridae | Xenosauridae |
| Xenotarsosaurus | Xenotarsosaurus |
| xenotransplante | xenotransplantation |
| Xenoturbella | Xenoturbella |
| Xenófanes | Xenophanes |
| Xenófanes de Cólofon | Xenophanes |
| xenófobo | xenophobic |
| xenónio | xenon |
| xenônio | xenon |
| Xeon | Xeon |
| xeque-mate | checkmate |
| xequerê | sekere |
| Xeraco | Xeraco |
| Xerazade | Scheherazade |
| Xeresa | Xeresa |
| xeretar | spy on |
| xerez | sherry |
| Xerez Club Deportivo | Xerez CD |
| xerife | sheriff |
