| X {num} (X) | :: س /sīn/ |
| Xena {prop} (a female given name) | :: زينا {f} /zīnā/ |
| xenoglossy {n} (glossolalia) SEE: glossolalia | :: |
| xenoglossy {n} (knowledge of a language one has never learned) | :: زينوغلوسيا |
| xenon {n} (chemical element) | :: إكسينون {m} /ʾiksinōn/ |
| xenophobia {n} (a pathological fear or hatred of strangers or foreigners) | :: رهاب الأجانب {m} /ruhāb al-ʾajānib/, كره الأجانب {m} /karh al-ʾajānib/ |
| xenotransplantation {n} (transplantation between species) | :: زرع الأعضاء |
| xerostomia {n} (dry mouth) SEE: dry mouth | :: |
| Xerxes {prop} (Xerxes I of Persia) | :: خشايارشا {m} /ḵšāyāršā/, خرخس {m} /ḵarḵas/ |
| Xerxes {prop} | :: خشايارشا {m} /ḵšāyāršā/, خرخس {m} /ḵarḵas/ |
| xi {n} (Greek letter) | :: كسي {m} /ksī/ |
| Xi {prop} (Chinese surname) | :: شي /šī/ |
| Xiamen {prop} (a sub-provincial city in southeastern China) | :: شيامن {m} /šyāmin/ |
| Xi'an {prop} (a city of China) | :: شيان {m} /šiyān/, شيئان {m} /šiʾān/ |
| Xianggang {prop} (Hong Kong) SEE: Hong Kong | :: |
| Xining {prop} (a city of China) | :: شينينغ {m} /šinīnḡ/ |
| Xinjiang {prop} (autonomous region of China) | :: شينجيانغ {m} /šinjyang/, شينجيانغ {m} /šinjyanḡ/ |
| Xinzhu {prop} (Hsinchu) SEE: Hsinchu | :: |
| xiphias {n} (xiphias) SEE: swordfish | :: |
| Xizang {prop} (Tibet) SEE: Tibet | :: |
| XML {prop} (extensible markup language) | :: إكس إم إل /إكس إم إل/ |
| X-ray {n} (short wavelength electromagnetic radiation) | :: أشعة إكس {m-p} /ʾašiʿʿat ʾeks/, أشعة سينية {m-p} /ʾašiʿʿa siniyya/ |
| X-ray {n} (photograph made with X-rays) | :: صورة أشعة {f} /ṣūra(t) ʾašiʿʿa/ |
| Xuzhou {prop} (a prefecture-level city of Jiangsu, China) | :: شوجو {m} /šujū/ |
| xylophone {n} (musical instrument) | :: زايلفون {m} /zaylufūn/ |