| Unit of nautical displacement | 29 |
| Unit of oil production: Abbr. | 29 |
| Unit of one cycle a second | 26 |
| Unit of online popularity | 25 |
| Unit of parsley or thyme | 24 |
| Unit of play in squash | 22 |
| Unit of potential difference | 28 |
| Unit of power, for short | 24 |
| Unit of pressure (Abbr.) | 24 |
| Unit of pressure: Abbr. | 23 |
| Unit of professional conduct | 28 |
| Unit of punishment at sea | 25 |
| Unit of quantity: Abbr. | 23 |
| Unit of quantum information | 27 |
| Unit of radiation exposure | 26 |
| Unit of RAM, for short | 22 |
| Unit of star measurement | 24 |
| Unit of surface measurement | 27 |
| Unit of syllabic length | 23 |
| Unit of the Green Berets | 24 |
| Unit of time, in prosody | 24 |
| Unit of value in Ankara | 23 |
| Unit of volume (not distance) | 29 |
| Unit of weight for nails | 24 |
| Unit of weight for wool | 23 |
| Unit of weight in India | 23 |
| Unit of weight in Turkey | 24 |
| Unit of weight, for short | 25 |
| Unit of wire thickness | 22 |
| Unit of work or energy | 22 |
| Unit of work, in physics | 24 |
| Unit often preceded by kilo- | 28 |
| Unit on a space vehicle | 23 |
| Unit or tract follower | 22 |
| Unit pricing preposition | 24 |
| Unit proposed by Leucippus | 26 |
| Unit replaced by the siemens | 28 |
| Unit represented by an omega | 28 |
| Unit smaller than a foot | 24 |
| Unit smaller than a foot? | 25 |
| Unit symbolized by an omega | 27 |
| Unit system in physics | 22 |
| Unit used in electromagnetism | 29 |
| Unit whose symbol is an omega | 29 |
| Unitard accompanier, perhaps | 28 |
| Unite after a break, in a way | 29 |
| United -- College Fund | 22 |
| United Airlines affiliate | 25 |
| United and Allied, e.g. | 23 |
| United Arab Emirates member | 27 |
| United code-share partner | 25 |
| United competitor: Abbr. | 24 |
| United Farm Workers leader | 26 |
| United Feature Synd. partner | 28 |
| United in holy matrimony | 24 |
| United in opinion: abbr. | 24 |
| United Kingdom citizen | 22 |
| United Kingdom component | 24 |
| United Kingdom currency | 23 |
| United maintenance group | 24 |
| United Nations agency (Abbr.) | 29 |
| United Nations Day mo. | 22 |
| United Nations Day's mo. | 28 |
| United Nations display | 22 |
| United Nations division | 23 |
| United Nations gathering | 24 |
| United Nations get-together | 27 |
| United Nations Plaza array | 26 |
| United Nations Plaza display | 28 |
| United Nations' goal | 24 |
| United nations, perhaps | 23 |
| United overseer: Abbr. | 22 |
| United regulator: Abbr. | 23 |
| United regulators: Abbr. | 24 |
| United States foe of 1898 | 25 |
| United States frontiersman | 26 |
| United States Open site | 23 |
| United with a blowtorch | 23 |
| United ___ College Fund | 23 |
| United ___ Day (October 24) | 27 |
| United's are friendly | 25 |
| UnitedHealth Group rival | 24 |
| UnitedHealthcare rival | 22 |
| Units equal to 0.1 microjoule | 29 |
| Units equal to 0.3527 ounces | 28 |
| Units equal to 10,000 gauss | 27 |
| Units for Boris Becker | 22 |
| Units for electricians | 22 |
| Units for exercise machines | 27 |
| Units for lease, for short | 26 |
| Units for measuring gold | 24 |
| Units for measuring wire | 24 |
| Units in a 2011 debt crisis | 27 |
| Units in a coll. curriculum | 27 |
| Units in a high rise (Abbr.) | 28 |
| Units in nuclear physics | 24 |
| Units in physics class | 22 |
| Units in real estate ads | 24 |
| Units in the cgs system | 23 |
| Units now called siemens | 24 |