| Useless but costly object | 25 |
| Useless condition | 17 |
| Useless effort | 14 |
| Useless footwear | 16 |
| Useless gift | 12 |
| Useless growth | 14 |
| Useless growths | 15 |
| Useless item in a closet | 24 |
| Useless items | 13 |
| Useless people | 14 |
| Useless person | 14 |
| Useless personnel | 17 |
| Useless project | 15 |
| Useless project, figuratively | 29 |
| Useless search | 14 |
| Useless stuff | 13 |
| Useless things | 14 |
| Useless tic-tac-toe line | 24 |
| Useless tic-tac-toe row | 23 |
| Useless venture | 15 |
| Useless, as a battery | 21 |
| Useless, as chatter | 19 |
| Useless, in the U.S.? | 21 |
| Useless: Slang | 14 |
| Useless; ineffective | 20 |
| Uselessly | 9 |
| Usenet message repository | 25 |
| Usenet messages | 15 |
| User | 4 |
| User fee | 8 |
| User interface | 14 |
| User of "little gray cells" | 37 |
| User of a certain lounge | 24 |
| User of a line and hook | 23 |
| User of a menu | 14 |
| User of a pad with a center rule | 32 |
| User of a prayer wheel | 22 |
| User of a record-keeping device called a quipu | 46 |
| User of a star-shaped weapon called a shuriken | 46 |
| User of air abrasion to clean teeth | 35 |
| User of an East Wing office | 27 |
| User of artful persuasion | 25 |
| User of barley malt | 19 |
| User of both Latin and Cyrillic alphabets | 41 |
| User of defib paddles | 21 |
| User of delaying tactics | 24 |
| User of mails: Abbr. | 20 |
| User of mind tricks | 19 |
| User of night vision | 20 |
| User of Rotten Row | 18 |
| User of scanning devices | 24 |
| User of silver bullets | 22 |
| User of spads and brads | 23 |
| User of strong language | 23 |
| User of the Force | 17 |
| User of the Pitman system | 25 |
| User of the prefix "i-" | 33 |
| User of the spare bedroom | 25 |
| User shortcuts | 14 |
| User trying to get through a firewall | 37 |
| User who hears "welcome" | 34 |
| User who may be a loser | 23 |
| User's accuser | 18 |
| User's annoyance | 20 |
| User's choice | 17 |
| User's circuit | 18 |
| User's designations | 23 |
| User's device | 17 |
| User's electronic record | 28 |
| User's entry point | 22 |
| User's fee | 14 |
| User's guide | 16 |
| User's helper | 17 |
| User's in-box junk | 22 |
| User's manual feature | 25 |
| User's morning reading | 26 |
| User's pursuer | 18 |
| User's read | 15 |
| User's reversal | 19 |
| User's shortcut | 19 |
| User's storage component | 28 |
| User's treatment | 20 |
| User-compiled references | 24 |
| User-edited online compendium of notable snippets | 49 |
| User-edited online reference | 28 |
| User-edited reference entry | 27 |
| User-edited site | 16 |
| User-edited Web site | 20 |
| User-friendly | 13 |
| User-friendly facility? | 23 |
| User-friendly picture | 21 |
| User-revised Web site | 21 |
| Users | 5 |
| Users drop it | 13 |
| Users might enter it | 20 |
| Users of barbells, e.g. | 23 |
| Users of cues | 13 |
| Users of electrolocation | 24 |
| Users of fowl language | 22 |
| Users of hub-and-spoke systems | 30 |