| Text | Length |
| Unknown place | 13 |
| Unknown power | 13 |
| Unknown power? | 14 |
| Unknown quantity | 16 |
| Unknown Richard | 15 |
| Unknown to many | 15 |
| Unknown woman | 13 |
| Unknown women | 13 |
| Unknown: Abbr. | 14 |
| Unknowns in algebra | 19 |
| Unlace, perhaps | 15 |
| Unladen weight | 14 |
| Unlatch, in poems | 17 |
| Unlatch, poetically | 19 |
| Unlatch, to bards | 17 |
| Unlatches, in verse | 19 |
| Unlawful act | 12 |
| Unlawful activity | 17 |
| Unlawful assembly | 17 |
| Unlawful constraint | 19 |
| Unlawful entry | 14 |
| Unlawful fire | 13 |
| Unlawful firing | 15 |
| Unlawful firing? | 16 |
| Unlawful takings | 16 |
| Unlawful to-dos | 15 |
| Unlawful, in Iberia | 19 |
| Unleaded alt. | 13 |
| Unleaded fuel | 13 |
| Unleash a diatribe | 18 |
| Unleash upon | 12 |
| Unleash, as havoc | 17 |
| Unleash, as mayhem | 18 |
| Unleashes (on) | 14 |
| Unleashes (upon) | 16 |
| Unleashes on | 12 |
| Unleavened bread | 16 |
| Unleavened breads | 17 |
| Unless (Lat.) | 13 |
| Unless (Latin) | 14 |
| Unless unwarranted | 18 |
| Unless, in court | 16 |
| Unless, in decrees | 18 |
| Unless, in law | 14 |
| Unless, legally | 15 |
| Unless, to Belli | 16 |
| Unless, to Brutus | 17 |
| Unless, to Caesar | 17 |
| Unless, to Cicero | 17 |
| Unless, to lawyers | 18 |
| Unless: Lat. | 12 |
| Unlicensed aides | 16 |
| Unlicensed taxi | 15 |
| Unlikable guy: var. | 19 |
| Unlike a beanpole | 17 |
| Unlike a bikini | 15 |
| Unlike a child | 14 |
| Unlike a coward | 15 |
| Unlike a dead ball | 18 |
| Unlike a desert | 15 |
| Unlike a dirt road | 18 |
| Unlike a figment | 16 |
| Unlike a go-getter | 18 |
| Unlike a juggernaut | 19 |
| Unlike a klutz | 14 |
| Unlike a legend | 15 |
| Unlike a martinet | 17 |
| Unlike a milksop | 16 |
| Unlike a mustang | 16 |
| Unlike a novice | 15 |
| Unlike a picnic? | 16 |
| Unlike a plane | 14 |
| Unlike a reactant | 17 |
| Unlike a scribble | 17 |
| Unlike a showboat | 17 |
| Unlike a slacker | 16 |
| Unlike a type A | 15 |
| Unlike a wild horse | 19 |
| Unlike an ort | 13 |
| Unlike aristos | 14 |
| Unlike bald tires | 17 |
| Unlike Bryn Mawr | 16 |
| Unlike bunny slopes | 19 |
| Unlike chickens | 15 |
| Unlike city hall | 16 |
| Unlike crews | 12 |
| Unlike dirt roads | 17 |
| Unlike doves | 12 |
| Unlike eagles | 13 |
| Unlike extras | 13 |
| Unlike fairies | 14 |
| Unlike fiction | 14 |
| Unlike filibusters | 18 |
| Unlike fish eyes | 16 |
| Unlike flat beer | 16 |
| Unlike fresh water | 18 |
| Unlike Godiva | 13 |
| Unlike gymnasts | 15 |
| Unlike HDTV screens | 19 |
| Unlike Ike: Abbr. | 17 |
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