| X | TEN3 | Level 473 |
| __X (WILD CAT) | LYN3 | July 29, 2025 |
| X PATTERNED | CRISSCROSS10 | Level 955 |
| X POST, EARLIER | TWEET5 | July 23, 2025, August 31, 2025, November 19, 2025 |
| X POST, ONCE | TWEET5 | Level 314 |
| X, FORMERLY | TWITTER7 | May 23, 2026 |
| X, IN ROME | TEN3 | May 13, 2026, July 30, 2026 |
| X-RAY ACTIVITY | IMAGING7 | Level 781 |
| X-RAY ANATOMY | XA2 | January 14, 2026 |
| X-RAY DEVICE | XD2 | July 27, 2026 (B) |
| X-RAY ELEMENT | XE2 | Level 118 |
| X-RAY EMISSION | XE2 | Level 765 |
| X-RAY INPUT | XI2 | Level 84, September 3, 2026 |
| X-RAY NODE | XN2 | March 21, 2026 |
| X-RAY OPERATOR | XO2 | November 16, 2025 |
| X-RAY ORBIT | XO2 | September 19, 2026 |
| X-RAY ROUTER | XR2 | September 5, 2025 |
| X-RAY, YANKEE, __ | ZULU4 | October 27, 2025 |
| X-__ | RAYS4 | Level 23 |
| X-__ (TOOL BRAND) | ACTO4 | Level 151 |
| X-___, MUTANT GROUP | MEN3 | Level 850 |
| XAVIER | X1 | Level 59, Level 913, January 31, 2026, March 29, 2026 |
| XAVIER UNIVERSITY | XU2 | June 21, 2025, Starter Daily 3 |
| XBOX | XB2 | Level 216 |
| XBOX | X1 | Level 446, Level 492 |
| XBOX PLAYER | GAMER5 | Level 640 |
| XBOX ZONE | XZ2 | Level 454 |
| XENON | X1 | Level 667 |
| XENON ATOM | XA2 | December 16, 2025, May 23, 2026 |
| XENON RAMP | XR2 | Level 443 |
| XENON UNIT | XU2 | December 9, 2025 |
| XENON ZIP | XZ2 | Level 500 |
| XEROGRAPHY | X1 | Level 4 |
| XEROX | X1 | Level 411, Level 564, Level 871, July 27, 2026 |
| XEROX EQPT. | XE2 | January 7, 2026 |
| XEROX INPUT | XI2 | October 22, 2025 |
| XEROX MODE | XM2 | Level 532 |
| XEROX PRINTERS | XPS3 | Level 13 |
| XEROX PRODUCT | COPY4 | Level 474 |
| XEROX SYSTEM | XS2 | Level 483 |
| XEROX TRACKER | XT2 | October 8, 2025 |
| XEROX UNIT | XU2 | December 1, 2025, March 15, 2026 |
| XEROX WAVE | XW2 | Level 550, July 25, 2026 (B) |
| XII | TWELVE6 | Level 459 |
| XL OR M | SIZE4 | Level 824, July 12, 2026 |
| XMAS | X1 | Level 60, Level 121, Level 835, December 31, 2025 |
| XMAS SONG | CAROL5 | September 2, 2026 |
| __XTILE | TE2 | Level 35 |
| XX | TENS4 | Level 220 |
| XYLEM | X1 | Level 91, Level 758, Level 783, September 7, 2025 +4 |
| XYLO | X1 | Level 771 |
| XYLOPHONE | X1 | Level 171, Level 438, Level 451, Level 479 +3 |
| XYLOPHONE KIN | MARIMBA7 | September 9, 2025, January 15, 2026 |
| X_Z | Y1 | Level 366 |