| Unit of RAM, for short | 22 |
| Unit of ranch land | 18 |
| Unit of real estate | 19 |
| Unit of reality? | 16 |
| Unit of refractive power of a lens | 34 |
| Unit of reluctance | 18 |
| Unit of resistance | 18 |
| Unit of resolution | 18 |
| Unit of retaliation, Biblically | 31 |
| Unit of scouts | 14 |
| Unit of sleep? | 14 |
| UniT of sound | 13 |
| Unit of speech | 14 |
| Unit of speed at sea | 20 |
| Unit of stage script | 20 |
| Unit of star measurement | 24 |
| Unit of stock | 13 |
| Unit of storage | 15 |
| Unit of storage capacity, informally | 36 |
| Unit of sugar | 13 |
| Unit of sugar or coal | 21 |
| Unit of sunshine | 16 |
| Unit of surface measurement | 27 |
| Unit of syllabic length | 23 |
| Unit of the Green Berets | 24 |
| Unit of the UN | 14 |
| Unit of Time | 12 |
| Unit of time, abbr. | 19 |
| Unit of time, in prosody | 24 |
| Unit of Time: Abbr. | 19 |
| Unit of tobacco | 15 |
| Unit of tone pitch | 18 |
| Unit of truth? | 14 |
| Unit of value in Ankara | 23 |
| Unit of volume | 14 |
| Unit of volume (not distance) | 29 |
| Unit of weight | 14 |
| Unit of weight for nails | 24 |
| Unit of weight for wool | 23 |
| Unit of weight in India | 23 |
| Unit of weight in the Far East | 30 |
| Unit of weight in Turkey | 24 |
| Unit of weight, for short | 25 |
| Unit of whipped cream | 21 |
| Unit of wire thickness | 22 |
| Unit of wisdom | 14 |
| Unit of wisdom? | 15 |
| Unit of wood | 12 |
| Unit of wordplay | 16 |
| Unit of work | 12 |
| Unit of work or energy | 22 |
| Unit of work, in physics | 24 |
| Unit of wound thread | 20 |
| Unit of X-ray dosage | 20 |
| Unit of yarn | 12 |
| Unit of Zulu warriors | 21 |
| Unit often burned off | 21 |
| Unit often counted | 18 |
| Unit often preceded by kilo- | 28 |
| Unit on a belt | 14 |
| Unit on a grange | 16 |
| Unit on a list | 14 |
| Unit on a space vehicle | 23 |
| Unit on a space vehicle, for short | 34 |
| Unit on an FM dial | 18 |
| Unit or sect suffix | 19 |
| Unit or tract follower | 22 |
| Unit price word | 15 |
| Unit pricing adverb | 19 |
| Unit pricing preposition | 24 |
| Unit pricing word | 17 |
| Unit proposed by Leucippus | 26 |
| Unit quantified in a subscript | 30 |
| Unit rendered obsolete by computer animation | 44 |
| Unit replaced by the siemens | 28 |
| Unit represented by an omega | 28 |
| Unit represented by an upside-down omega | 40 |
| Unit scrimmaging against the starters | 37 |
| Unit slightly larger than a joule: abbr. | 40 |
| Unit smaller than a foot | 24 |
| Unit smaller than a foot? | 25 |
| Unit symbolized by an omega | 27 |
| Unit system in physics | 22 |
| Unit that's larger than 19 trillion miles | 45 |
| Unit that's the reciprocal of an ohm | 40 |
| Unit tracked by the Nikkei Index | 32 |
| Unit under a master | 19 |
| Unit used in electromagnetism | 29 |
| Unit used in expressing salaries | 32 |
| Unit used in measuring wire diameters | 37 |
| Unit used regarding celery, since it requires more energy to eat it than it contains | 84 |
| Unit used to jokingly describe celery, since it requires more energy to eat it than it contains | 95 |
| Unit used to measure a city's area: abbr. | 45 |
| Unit whose name comes from the Greek word for "work" | 62 |
| Unit whose symbol is an omega | 29 |
| Unit with fees | 14 |
| Unit with six outs | 18 |
| Unit's core group | 21 |
| Unit, in Bonn | 13 |
| Unit-cost word | 14 |