| Union: first stage | 18 |
| Union: last stage | 17 |
| Union: second stage | 19 |
| Union: third stage | 18 |
| Uniondale skaters | 17 |
| Unionist Chavez | 15 |
| Unionist's bane | 19 |
| Unionize | 8 |
| Unionize, so to speak? | 22 |
| Unionize? | 9 |
| Unionized driver | 16 |
| Unionizes, in a way | 19 |
| Unionless factories | 19 |
| Unions | 6 |
| Unions in "Monsoon Wedding" and many other romantic Bollywood movies | 78 |
| Unions of a sort | 16 |
| Unions of sorts | 15 |
| Unions, collectively | 20 |
| Unipodal | 8 |
| Unipodal whaler | 15 |
| Unique | 6 |
| Unique 1960's TV star | 25 |
| Unique ancient tongue of SW Europe | 34 |
| Unique birds | 12 |
| Unique button in 007's Aston Martin | 39 |
| Unique character | 16 |
| Unique entity | 13 |
| Unique feature of the Green Bay Packers | 39 |
| Unique fellow | 13 |
| Unique folks | 12 |
| Unique guy | 10 |
| Unique identifier for dogs | 26 |
| Unique identifier using the five vowels | 39 |
| Unique individual | 17 |
| Unique item or person | 21 |
| Unique items or people | 22 |
| Unique mystique | 15 |
| Unique numbers assigned to websites | 35 |
| Unique object | 13 |
| Unique object or person | 23 |
| Unique people | 13 |
| Unique person | 13 |
| Unique person or thing | 22 |
| Unique person, informally | 25 |
| Unique persons | 14 |
| Unique shades at the stable? | 28 |
| Unique soul | 11 |
| Unique stretch in time | 22 |
| Unique thing | 12 |
| Unique thing or person | 22 |
| Unique things | 13 |
| Unique TV horse | 15 |
| Unique types | 12 |
| Unique, to Caesar | 17 |
| Uniquely | 8 |
| Uniqueness | 10 |
| Uniroyal product | 16 |
| Unisex | 6 |
| Unisex accessory | 16 |
| Unisex casual wear | 18 |
| Unisex casualwear | 17 |
| Unisex cologne since 1994 | 25 |
| Unisex designer cologne | 23 |
| Unisex dress | 12 |
| Unisex first name | 17 |
| Unisex fragrance introduced in 1996 | 35 |
| Unisex garb | 11 |
| Unisex garment | 14 |
| Unisex gown of old Greece | 25 |
| Unisex name | 11 |
| Unisex name in Russia | 21 |
| Unisex name meaning "born again" | 42 |
| Unisex nickname | 15 |
| Unisex Shakespearean play? | 26 |
| Unisex shirts | 13 |
| Unisex skirts | 13 |
| Unisex top | 10 |
| Unisex wear | 11 |
| Unisex winter apparel | 21 |
| Unisex wrap | 11 |
| Unisex wraparound skirt of Polynesia | 36 |
| Unisex, as dorms | 16 |
| Unison cheer (1894) | 19 |
| Unisonally | 10 |
| Unisphere, e.g. | 15 |
| Unisphere, essentially | 22 |
| Unit | 4 |
| Unit a little longer than an arm's length | 45 |
| Unit amount of sunlight seen? | 29 |
| Unit at a pub | 13 |
| Unit at a reactor | 17 |
| Unit at a state park | 20 |
| Unit at Harvard | 15 |
| Unit at the Olympics | 20 |
| Unit at the top of a browser | 28 |
| Unit at Wimbledon | 17 |
| Unit attachment | 15 |
| Unit by unit, in succession | 27 |
| Unit charge | 11 |
| Unit circle radius | 18 |