| Unmanly man | 11 |
| Unmanned aerial raids | 21 |
| Unmanned aircraft | 17 |
| Unmanned craft that makes targeted attacks | 42 |
| Unmanned flier | 14 |
| Unmanned flight | 15 |
| Unmanned military craft | 23 |
| Unmanned NASA mission of the '70s | 37 |
| Unmanned plane | 14 |
| Unmanned planes | 15 |
| Unmanned solar-powered aircraft tested in the 1980s and 1990s | 61 |
| Unmanned space probe launched Aug. 20, 1977 | 43 |
| Unmanned sub that found the Titanic | 35 |
| Unmanned vehicle that found the Titanic | 39 |
| Unmanned vessel that found the Titanic | 38 |
| Unmanned, unsettling military flier | 35 |
| Unmannered | 10 |
| Unmannered fellow | 17 |
| Unmannered sort | 15 |
| Unmannered type | 15 |
| Unmannerly | 10 |
| Unmannerly fellow | 17 |
| Unmannerly guy | 14 |
| Unmannerly man | 14 |
| Unmannerly men | 14 |
| Unmannerly one | 14 |
| Unmannerly ones | 15 |
| Unmannerly person | 17 |
| Unmannerly sort | 15 |
| Unmannerly type | 15 |
| Unmarried | 9 |
| Unmarried lady of Sp. | 21 |
| Unmarried lady, in Mex. | 23 |
| Unmarried men | 13 |
| Unmarried one | 13 |
| Unmarried partner, in modern lingo | 34 |
| Unmarried partner, to the Census Bureau | 39 |
| Unmarried woman | 15 |
| Unmarried woman's title | 27 |
| Unmarried woman, in Oaxaca | 26 |
| Unmarried women | 15 |
| Unmarried women, once | 21 |
| Unmarried young woman | 21 |
| Unmarried, say | 14 |
| Unmask | 6 |
| Unmasked | 8 |
| Unmasked, as an undercover cop | 30 |
| Unmasker of many a false ghost | 30 |
| Unmasker's cry | 18 |
| Unmasks | 7 |
| Unmatched | 9 |
| Unmatched feat | 14 |
| Unmatched sets | 14 |
| Unmatched, as a sock | 20 |
| Unmatched, as socks | 19 |
| Unmatched, like socks | 21 |
| Unmatched? | 10 |
| Unmatching | 10 |
| Unmated | 7 |
| Unmatured egg | 13 |
| Unmeaningful | 12 |
| Unmeasured amount | 17 |
| Unmediated observer | 19 |
| Unmelodic | 9 |
| Unmelodic sounds | 16 |
| Unmemorable low-budget film | 27 |
| Unmemorized remark | 18 |
| Unmemorized words | 17 |
| Unmentionable | 13 |
| Unmentionable place? | 20 |
| Unmentionables | 14 |
| Unmentioned | 11 |
| Unmerciful | 10 |
| Unmerciful Athenian lawgiver | 28 |
| Unmindful | 9 |
| Unmined minerals | 16 |
| Unmistakable | 12 |
| Unmistakably | 12 |
| Unmitigated | 11 |
| Unmitigated gall | 16 |
| Unmitigated military leader? | 28 |
| Unmitigated nerve | 17 |
| Unmitigated stuff | 17 |
| Unmitigated untruths | 20 |
| Unmitigated ___ | 15 |
| Unmixed | 7 |
| Unmixed at a mixer | 18 |
| Unmixed, as a drink | 19 |
| Unmixed, as whiskey | 19 |
| Unmixed, at a mixer | 19 |
| Unmixed, to a mixologist | 24 |
| Unmodern | 8 |
| Unmodernized | 12 |
| Unmodified | 10 |
| Unmoist | 7 |
| Unmolested | 10 |
| Unmoored | 8 |
| Unmopped area? | 14 |
| Unmopped? | 9 |
| Unmotivated | 11 |