| Unit of currency replaced by the kwanza in Angola | 49 |
| Unit of currency in the Harry Potter books | 42 |
| Unit of currency in Denmark | 27 |
| Unit of cultural information | 28 |
| Unit of cotton | 14 |
| Unit of corporal punishment | 27 |
| Unit of corn | 12 |
| Unit of contraband | 18 |
| Unit of conductance | 19 |
| Unit of computer storage | 24 |
| Unit of computer memory | 23 |
| Unit of college work | 20 |
| Unit of Chinese currency | 24 |
| Unit of chewing tobacco | 23 |
| Unit of change | 14 |
| Unit of cell phone usage: Abbr. | 31 |
| Unit of cards | 13 |
| Unit of capacity in England | 27 |
| Unit of capacity (2150.42 cu. in.) | 34 |
| Unit of capacity | 16 |
| Unit of capacitance | 19 |
| Unit of Cambodian currency | 26 |
| Unit of bricks | 14 |
| Unit of breath freshening | 25 |
| Unit of bitters | 15 |
| Unit of bananas: Abbr. | 22 |
| Unit of assorted merchandise | 28 |
| Unit of asparagus | 17 |
| Unit of Asian currency | 22 |
| Unit of area | 12 |
| Unit of applause | 16 |
| Unit of angular measurement | 27 |
| Unit of angular measure | 23 |
| Unit of ammo for a werewolf hunter | 34 |
| Unit of advice | 14 |
| Unit of acoustics | 17 |
| Unit of acceleration | 20 |
| Unit of academic credit | 23 |
| Unit of absorbed energy | 23 |
| Unit of a play's act | 24 |
| Unit of a molecule | 18 |
| Unit of a legion | 16 |
| Unit of a huge explosion | 24 |
| Unit of a foot? | 15 |
| Unit of a flight of stairs | 26 |
| Unit of 36' | 15 |
| Unit of 100 ergs per gram | 25 |
| Unit of 1,000 kilograms | 23 |
| Unit now known as a siemens | 27 |
| Unit now called a siemens | 25 |
| Unit named for a telephone pioneer | 34 |
| Unit named for a physicist | 26 |
| Unit named for a French physicist | 33 |
| Unit named after the inventor of the telephone | 46 |
| Unit measuring loudness | 23 |
| Unit measured by a gauge | 24 |
| Unit involved in a shell game? | 30 |
| Unit inserted through the vagina, briefly | 41 |
| Unit indicating loudness | 24 |
| Unit indicated by an omega | 26 |
| Unit indicated by " | 24 |
| Unit in verse | 13 |
| Unit in una zona residencial | 28 |
| Unit in the definition of surface tension | 41 |
| Unit in the c.g.s. system | 25 |
| Unit in tennis | 14 |
| Unit in realty | 14 |
| Unit in physics | 15 |
| Unit in measuring population density | 36 |
| Unit in many a sentence | 23 |
| Unit in linguistics | 19 |
| Unit in history class | 21 |
| Unit in gemology | 16 |
| Unit in electricity | 19 |
| Unit in astronomy | 17 |
| Unit in an erg's definition | 31 |
| Unit in acoustics | 17 |
| Unit in a tray at the register | 30 |
| Unit in a terrorist organization | 32 |
| Unit in a radar receiver | 24 |
| Unit in a plan | 14 |
| Unit in a physics textbook | 26 |
| Unit in a multiunit building | 28 |
| Unit in a joule | 15 |
| Unit in a gym workout | 21 |
| Unit in a gym | 13 |
| Unit in a geology book | 22 |
| Unit in a case | 14 |
| Unit in a Brownian model | 24 |
| Unit in a block | 15 |
| Unit in a "Mary Poppins" song | 39 |
| Unit having two or more battalions | 34 |
| Unit from the Greek for "work" | 40 |
| Unit from Mars? | 15 |
| Unit for Steve Cram | 19 |
| Unit for Shakespeare | 20 |
| Unit for Pearl White | 20 |
| Unit for nukes | 14 |
| Unit for My Son John | 20 |
| Unit for modern processors | 26 |