| Article | Vol | Words |
|---|---|---|
| UBES | 18 | 89 |
| UBIQUITARIANS | 18 | 177 |
| UBIQUITY | 18 | 27 |
| UDDER | 18 | 26 |
| UKRAINE | 18 | 128 |
| ULCER | 18 | 13 |
| ULEX | 18 | 109 |
| ULIETEA | 18 | 191 |
| ULIGINOUS | 18 | 12 |
| ULLAGE | 18 | 17 |
| ULM | 18 | 100 |
| ULMUS | 18 | 283 |
| ULSTER | 18 | 222 |
| UMBELLIFEROUS PLANTS | 18 | 14 |
| UMBER | 18 | 156 |
| UMBILICAL | 18 | 9 |
| UMBRELLA | 18 | 33 |
| UMPIRE | 18 | 11 |
| UNCIA | 18 | 34 |
| UNCTION | 18 | 356 |
| UNDECAGON | 18 | 18 |
| UNDECEMVIR | 18 | 112 |
| UNDERWALD | 18 | 61 |
| UNDERWOOD | 18 | 10 |
| UNDULATION | 18 | 25 |
| UNGUENT | 18 | 20 |
| UNICORN | 18 | 82 |
| UNIFORM | 18 | 32 |
| UNIFORMITY | 18 | 122 |
| UNION | 18 | 766 |
| UNIT | 18 | 15 |
| UNITARIANS | 18 | 31 |
| UNITED BRETHREN | 18 | 3,009 |
| UNITED PROVINCES | 18 | 19,217 |
| UNITY | 18 | 72 |
| UNIVERSAL | 18 | 18 |
| UNIVERSE | 18 | 22 |
| UNIVERSITY | 18 | 1,280 |
| UPHOLSTER | 18 | 16 |
| UPLAND | 18 | 82 |
| UPSAL | 18 | 132 |
| UPUPA | 18 | 361 |
| UR | 18 | 90 |
| URALLIAN CHAIN | 18 | 25 |
| URANIA | 18 | 33 |
| URANIUM | 18 | 399 |
| URANOSCOPUS | 18 | 66 |
| URETERS | 18 | 6 |
| URETHRA | 18 | 259 |
| URINAL | 18 | 72 |
| URINE | 18 | 53 |
| URN | 18 | 92 |
| URSA | 18 | 11 |
| URSULINES | 18 | 29 |
| URSUS | 18 | 1,784 |
| URTICA | 18 | 451 |
| USANCE | 18 | 48 |
| USE | 18 | 38 |
| USHANT | 18 | 19 |
| USHER | 18 | 790 |
| USHER OF THE BLACK ROD | 18 | 28 |
| USK | 18 | 26 |
| USQUEBAUGH | 18 | 174 |
| USTION | 18 | 10 |
| USUFRUIT | 18 | 38 |
| USURER | 18 | 10 |
| USURIOUS CONTRACT | 18 | 20 |
| USURPATION | 18 | 19 |
| USURY | 18 | 192 |
| UTERUS | 18 | 6 |
| UTICA | 18 | 99 |
| UTRECHT | 18 | 386 |
| UTRICULARIA | 18 | 63 |
| UVULA | 18 | 6 |
| UZ | 18 | 422 |
| URALIAN COSSACS | 502 | 288 |
| URBINO | 502 | 160 |
| URCEOLA | 502 | 6,414 |