| radical | extreme |
| Radical de un ideal | Radical of an ideal |
| radical libre | free radical |
| Radical OH | OH radical |
| radicalismo | radicalism |
| radicalmente | radically |
| radiestesia | dowsing |
| radiestesista | diviner |
| Radikal | Radikal gazetesi |
| radio | wireless |
| radio a galena | crystal set |
| Radio Bart | Radio Bart |
| Radio Berlín Internacional | Radio Berlin International |
| Radio Corporation of America | RCA |
| Radio covalente | Covalent radius |
| Radio de acción | Radius |
| Radio de Bohr | Bohr radius |
| Radio de Holmberg | Holmberg radius |
| Radio de Hubble | Hubble radius |
| Radio de Schwarzschild | Schwarzschild radius |
| radio de transistores | transistor radio |
| Radio de van der Waals | Van der Waals radius |
| Radio Disney | Radio Disney |
| Radio e Television Rumantscha | Radio e Television Rumantscha |
| Radio Francia Internacional | Radio France Internationale |
| Radio Free Roscoe | Radio Free Roscoe |
| Radio Habana Cuba | Radio Havana Cuba |
| Radio iRATE | IRATE radio |
| Radio iónico | Ionic radius |
| Radio límite por efecto de ma | Tidal radius |
| Radio Martí | Radio Marti |
| Radio Moscú | Voice of Russia |
| Radio Nederland Wereldomroep | Radio Netherlands Worldwide |
| Radio NOAA | NOAA Weather Radio All Hazards |
| Radio Praga | Radio Prague |
| Radio solar | Solar radius |
| Radio Telefís Éireann | Radio Telefís Éireann |
| Radio Televizioni Shqiptar | Radio Televizioni Shqiptar |
| Radio Télévision Belge de la Communauté Française | RTBF |
| Radio Télévision Libre des Mille Collines | Radio Télévision Libre des Mille Collines |
| Radio Vaticano | Vatican Radio |
| Radio y Televisión de Andalucía | Radiotelevisión Andaluza |
| Radio y Televisión de Portugal | Rádio e Televisão de Portugal |
