| Radius, ulna, etc. | 18 |
| Radius, to diameter | 19 |
| Radius, for one | 15 |
| Radius, e.g. | 12 |
| Radius, but not diameter | 24 |
| Radius's setting | 20 |
| Radius's place | 18 |
| Radius's partner | 20 |
| Radius's neighbor | 21 |
| Radius's locale | 19 |
| Radius's limb | 17 |
| Radius's counterpart | 24 |
| Radius's comrade-in-arms? | 29 |
| Radius's companion | 22 |
| Radius's area? | 18 |
| Radius' place | 17 |
| Radius' partner | 19 |
| Radius' neighbor | 20 |
| Radius' comrade-in-arms? | 28 |
| Radius' companion | 21 |
| Radius times two | 16 |
| Radius starting point: Abbr. | 28 |
| Radius squared times pi | 23 |
| Radius site | 11 |
| Radius setting | 14 |
| Radius partners | 15 |
| Radius partner | 14 |
| Radius paralleler | 17 |
| Radius or vomer | 15 |
| Radius or tibia | 15 |
| Radius or scapula | 17 |
| Radius or rib | 13 |
| Radius or femur | 15 |
| Radius of a wheel | 17 |
| Radius neighbors | 16 |
| Radius neighbor | 15 |
| Radius mate | 11 |
| Radius location | 15 |
| Radius locale | 13 |
| Radius end | 10 |
| Radius doubled | 14 |
| Radius companion | 16 |
| Radius and ulna, for example | 28 |
| Radius | 6 |
| Radium, e.g. | 12 |
| Radium symbol | 13 |
| Radium pioneer | 14 |
| Radium isotope: Abbr. | 21 |
| Radium finder? | 14 |
| Radium discoverers | 18 |
| Radium discoverer born in Warsaw, Pol. | 38 |
| Radium discoverer | 17 |
| Radium codiscoverer | 19 |
| Radium co-discoverer Marie or Pierre | 36 |
| Radium co-discoverer Marie | 26 |
| Radium co-discoverer | 20 |
| Radisson rival | 14 |
| Radisson alternative | 20 |
| Radishes, e.g. | 14 |
| Radishes' kin | 17 |
| Radish, for one | 15 |
| Radish, e.g. | 12 |
| Radish or turnip | 16 |
| Radish or radix | 15 |
| Radish or carrot, e.g. | 22 |
| Radish or carrot | 16 |
| Radish e.g. | 12 |
| Radiotherapy ray | 16 |
| Radiotelephony term | 19 |
| Radiotelephony response | 23 |
| Radiotelegraphy code inventor | 29 |
| RadioShack's __-80 computer | 31 |
| RadioShack stock | 16 |
| Radios, e.g. | 12 |
| Radios in rigs | 14 |
| Radios for good buddies? | 24 |
| Radios | 6 |
| Radioman's room | 19 |
| Radioman's nickname | 23 |
| Radiology test | 14 |
| Radiology staple, for short | 27 |
| Radiology pioneer Curie | 23 |
| Radiologist's tool, briefly | 31 |
| Radiologist's procedure, briefly | 36 |
| Radiologist's photo | 23 |
| Radiologist's item | 22 |
| Radiologist's concern | 25 |
| Radiological scan, for short | 28 |
| Radiola maker | 13 |
| Radioisotopes used in medicine | 30 |
| Radiohead: "___ the Ladder" | 37 |
| Radiohead: "House of ___" | 35 |
| Radiohead's Yorke | 21 |
| Radiohead's former record label | 35 |
| Radiohead's 4th | 19 |
| Radiohead's "___ Police" | 38 |
| Radiohead song written about Egypt? | 35 |
| Radiohead singer Thom | 21 |
| Radiohead record label | 22 |
| Radiohead producer Godrich | 26 |