| Text | Length |
| X3 and Z4, for two | 18 |
| Xmas-tree hangings | 18 |
| XXX, to the Greeks | 18 |
| X's, in Greece | 18 |
| Xerography product | 18 |
| Xbox brains: Abbr. | 18 |
| X-files descriptor | 18 |
| X-rated literature | 18 |
| X-Games telecaster | 18 |
| Xerxes's queen | 18 |
| Xanadu's owner | 18 |
| X, in some letters | 18 |
| XOXOXO alternative | 18 |
| Xylophone relative | 18 |
| X-ray's cousin | 18 |
| Xenon's cousin | 18 |
| X-rated utterances | 18 |
| Xenia's locale | 18 |
| XXX's opposite | 18 |
| Xerxes' domain | 18 |
| Xerxes's realm | 18 |
| Xerxes' empire | 18 |
| X-rated, for short | 18 |
| X-ray dosage units | 18 |
| X-ray measurements | 18 |
| Xmas tree activity | 18 |
| XCV years from now | 18 |
| X-rated exhibition | 18 |
| X-ray for Rex, say | 18 |
| X-ray, for example | 18 |
| X-movie ingredient | 18 |
| X Games competitor | 18 |
| X's in bowling | 18 |
| Xmas worker, often | 18 |
| X, in ancient Rome | 18 |
| X's, sometimes | 18 |
| Xmas-tree décor | 18 |
| Xmas tree trimming | 18 |
| Xerography powders | 18 |
| Xmas in 2001, e.g. | 18 |
| X or Y, in algebra | 18 |
| XC60, XC70 or XC90 | 18 |
| X, to Hippocrates | 17 |
| X, as in Xenophon | 17 |
| X's, in Crete | 17 |
| XXXXIII times XIV | 17 |
| XING sign critter | 17 |
| XIII x XIII x III | 17 |
| Xmas time in NYC? | 17 |
| X, on a shirt tag | 17 |
| X or ick follower | 17 |
| Xenon and krypton | 17 |
| X-files actor Dan | 17 |
| Xylophone striker | 17 |
| Xerox predecessor | 17 |
| XC years from now | 17 |
| X-ray alternative | 17 |
| Xenia's state | 17 |
| Xerxes ruled here | 17 |
| X-ray dosage unit | 17 |
| X Games adjective | 17 |
| Xerox, as a Xerox | 17 |
| Xmas visitor, say | 17 |
| X, for Washington | 17 |
| XXV Olympics site | 17 |
| Xavier and family | 17 |
| Xbox One, for one | 17 |
| Xylophone cousins | 17 |
| X-Men creator Lee | 17 |
| Xerxes' horse | 17 |
| Xanthippe was one | 17 |
| X or O, in a game | 17 |
| X-and-O game show | 17 |
| Xerography powder | 17 |
| X on a map, maybe | 17 |
| X in a box, maybe | 17 |
| X maker, at times | 17 |
| Xmas door hanging | 17 |
| Xiangtan servant | 16 |
| Xiamen, formerly | 16 |
| Xena's horse | 16 |
| Xena's steed | 16 |
| x and y, perhaps | 16 |
| X'ers parent | 16 |
| Xbox battle game | 16 |
| Xmas candy piece | 16 |
| Xerox competitor | 16 |
| X, in old Greece | 16 |
| Xenophon's X | 16 |
| Xmas time: Abbr. | 16 |
| XXIII times XXIV | 16 |
| Xanadu structure | 16 |
| Xylophone cousin | 16 |
| X-file examiners | 16 |
| Xenophobes, e.g. | 16 |
| X, on a mall map | 16 |
| XFs, XJs and XKs | 16 |
| X, in valentines | 16 |
| X-rated Lovelace | 16 |
| Xerox tray abbr. | 16 |
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