| Underwater hazard marker | 24 |
| Underwater hazards | 18 |
| Underwater herbivore | 20 |
| Underwater ink squirter | 23 |
| Underwater ink stains? | 22 |
| Underwater killer | 17 |
| Underwater knoll | 16 |
| Underwater lateral surface? | 27 |
| Underwater man | 14 |
| Underwater menace | 17 |
| Underwater menace? | 18 |
| Underwater military guy | 23 |
| Underwater missile | 18 |
| Underwater naval habitat | 24 |
| Underwater object locater | 25 |
| Underwater obstacle | 19 |
| Underwater peak | 15 |
| Underwater pit residents | 24 |
| Underwater plant | 16 |
| Underwater power source? | 24 |
| Underwater predator | 19 |
| Underwater projectile | 21 |
| Underwater propeller? | 21 |
| Underwater ray | 14 |
| Underwater research site | 24 |
| Underwater research vessel | 26 |
| Underwater ridge | 16 |
| Underwater salvager, e.g. | 25 |
| Underwater sandbank | 19 |
| Underwater search device | 24 |
| Underwater search vessel | 24 |
| Underwater shocker | 18 |
| Underwater slitherer | 20 |
| Underwater slitherers | 21 |
| Underwater sound detectors | 26 |
| Underwater sound device | 23 |
| Underwater speaker? | 19 |
| Underwater sport | 16 |
| Underwater steerer | 18 |
| Underwater steering mechanisms | 30 |
| Underwater swimmer | 18 |
| Underwater tank | 15 |
| Underwater test site | 20 |
| Underwater transmission | 23 |
| Underwater trap | 15 |
| Underwater treasure | 19 |
| Underwater vessel | 17 |
| Underwater vessel, briefly | 26 |
| Underwater vessels | 18 |
| Underwater vessels, for short | 29 |
| Underwater wave generator | 25 |
| Underwater weapon | 17 |
| Underwater wiggler | 18 |
| Underwater worker | 17 |
| Underwater zappers | 18 |
| Underwater-mine finder, e.g. | 28 |
| Underwater-torpedo inventor | 27 |
| Underwater-tunnel digger | 24 |
| Underway | 8 |
| Underway to over there | 22 |
| Underway to over there? | 23 |
| Underway, to Holmes | 19 |
| Underway, to Sherlock | 21 |
| Underway, to Sherlock Holmes | 28 |
| Underwear | 9 |
| Underwear of yore | 18 |
| Underwear and socks inventory? | 30 |
| Underwear brand | 15 |
| Underwear brand that recently ended their relationship with Charlie Sheen | 73 |
| Underwear choice | 16 |
| Underwear fabric | 16 |
| Underwear fabrics | 17 |
| Underwear for Elsie? | 20 |
| Underwear for the unhinged? | 27 |
| Underwear given for door prize? | 31 |
| Underwear initials | 18 |
| Underwear letters | 17 |
| Underwear logo | 14 |
| Underwear material | 18 |
| Underwear of yore | 17 |
| Underwear prank performed while someone takes a photograph? | 59 |
| Underwear promoted by Michael Jordan | 36 |
| Underwear that never needs washing? | 35 |
| Underwear top | 13 |
| Underwear units | 15 |
| Underwear with underwire | 24 |
| Underwear, for short | 20 |
| Underweight | 11 |
| Underweight delivery, maybe | 27 |
| Underwent | 9 |
| Underwent a recession | 21 |
| Underwent chemical change | 25 |
| Underwent reduction | 19 |
| Underwent reflection? | 21 |
| Underwent remission of fever | 28 |
| Underwhelmed grunt | 18 |
| Underwire garment | 17 |
| Underwire holder | 16 |
| Underwire underwear | 19 |
| Underwood | 9 |