| Unavailable, in a way | 21 |
| Unavailable, at a gallery: Abbr. | 32 |
| Unavailable, as for appointments | 32 |
| Unavailable right now | 21 |
| Unavailable now | 15 |
| Unavailable for appointments | 28 |
| Unavailable at the moment | 25 |
| Unavailable | 11 |
| Unauthorized, as a concert recording | 36 |
| Unauthorized work stoppage | 26 |
| Unauthorized withdrawal? | 24 |
| Unauthorized user? | 18 |
| Unauthorized striker's appeal for support? | 46 |
| Unauthorized strike | 19 |
| Unauthorized stories written by devotees | 40 |
| Unauthorized revelation | 23 |
| Unauthorized preview, say | 25 |
| Unauthorized pickups | 20 |
| Unauthorized news sources | 25 |
| Unauthorized Nancy Reagan biographer | 36 |
| Unauthorized explorer of city tunnels and sewers | 48 |
| Unauthorized DVD | 16 |
| Unauthorized disclosures | 24 |
| Unauthorized disclosure | 23 |
| Unauthorized departer | 21 |
| Unauthorized concert recording | 30 |
| Unauthorized absentees | 22 |
| Unauthorized absentee | 21 |
| Unauthorized | 12 |
| Unaugmented wages | 17 |
| Unau and ai | 11 |
| Unattributed: Abbr. | 19 |
| Unattributed, in Bartlett's | 31 |
| Unattributed, as a quote: Abbr. | 31 |
| Unattractively old-fashioned | 28 |
| Unattractive, as a neighborhood | 31 |
| Unattractive, and then some | 27 |
| Unattractive tropical fruit | 27 |
| Unattractive Jamaican fruit | 27 |
| Unattractive fruit? | 19 |
| Unattractive fruit that sounds that way | 39 |
| Unattractive fruit | 18 |
| Unattractive feature | 20 |
| Unattractive citrus? | 20 |
| Unattractive aspects | 20 |
| Unattractive | 12 |
| Unattended laundry job | 22 |
| Unattended inbox work, e.g. | 27 |
| Unattended | 10 |
| Unattainable dream | 18 |
| Unattainable aspiration | 23 |
| Unattached male | 15 |
| Unattached | 10 |
| Unassuming nature | 17 |
| Unassuming fellow | 17 |
| Unassuming | 10 |
| Unassisted vision | 17 |
| Unassisted viewer | 17 |
| Unassisted putout? | 18 |
| Unassisted performances | 23 |
| Unassisted numbers | 18 |
| Unassisted MLB coups | 20 |
| Unassisted | 10 |
| Unassertive type | 16 |
| Unassertive sort | 16 |
| Unassertive one | 15 |
| Unassertive | 11 |
| Unassailable, as an alibi | 25 |
| Unassailable beefs? | 19 |
| Unaspirated, in phonetics | 25 |
| Unaspirated, in old phonetics | 29 |
| Unaspirated consonants | 22 |
| Unaspirated consonant | 21 |
| Unaspirated | 11 |
| Unaspiratedconsonant | 21 |
| Unaspirate | 10 |
| Unasked-for e-mail | 18 |
| Unarmored, in a way | 19 |
| Unarmed, to a police officer | 28 |
| Unarmed, to a cop | 17 |
| Unarmed, in slang | 17 |
| Unarmed, in police lingo | 24 |
| Unarmed scouting plane | 22 |
| Unarmed figure? | 15 |
| Unarmed combat | 14 |
| Unarmed | 7 |
| Unaristocratic, to a Brit | 25 |
| Unappropriated financial aid? | 29 |
| Unapproachable | 14 |
| Unappreciative sort | 19 |
| Unappreciative response | 23 |
| Unappreciative ones | 19 |
| Unappreciative one | 18 |
| Unappreciated worker | 20 |
| Unappetizingly pureed food | 26 |
| Unappetizing stuff | 18 |
| Unappetizing serving | 20 |
| Unappetizing ladleful | 21 |
| Unappetizing food servings | 26 |
| Unappetizing food | 17 |