| radio play | novela de radio |
| Radio Prague | Radio Praga |
| radio programme | programa de radio |
| Radio programming | Radio |
| Radio quiet quasar | Cuasar en calma radio |
| radio reception | acogida |
| Radio recombination line | Línea radio de recombinación |
| Radio source catalogs | Catálogo de las radiofuentes |
| Radio star | Estrella radio |
| radio station | estación de radio |
| Radio structure | Estructura radio |
| Radio Telefís Éireann | Radio Telefís Éireann |
| Radio telescope | Radiotelescopio |
| Radio Television of Kosovo | Radiotelevisión de Kosovo |
| Radio Television Rumantscha | Radio e Television Rumantscha |
| Radio Televizioni Shqiptar | Radio Televizioni Shqiptar |
| Radio Tower Gliwice | Operación Himmler |
| Radio tube | Válvula termoiónica |
| Radio Télévision Libre des Mille Collines | Radio Télévision Libre des Mille Collines |
| Radio waveguide | Guía de ondas radio |
| Radio-controlled car | Automóvil teledirigido |
| Radio-frequency identification | RFID |
| radioactive | radioactivo |
| radioactive contamination | contaminacíon radiactiva |
| radioactive decay | radioactividad |
| radioactive decontamination | descontaminación radiactiva |
| radioactive dumping | vertidos radiactivos |
| radioactive emission | emisión radiactiva |
| radioactive fallout | polvillo |
| Radioactive Man | Hombre Radioactivo |
| radioactive pollutant | contaminantes radiactivos |
| radioactive substance | sustancias radiactivas |
| radioactive tracer | trazador radiactivo |
| radioactive waste | residuos radiactivos |
| Radioactivite decay | Radiactividad |
| radioactivity | radioactividad |
| Radiocarbon dating | Datación por radiocarbono |
| radioelement | cuerpo simple radiactivo |
| Radiofax | Radio NOAA |
| radiogram | radiograma |
| radiograph | radiografía |
| radiographer | radiólogo |
| radiography | radiografía |
| Radiohead | Radiohead |
| Radioisotope rocket | Cohete de radioisótopos |
| Radioisotope thermoelectric generator | Generador termoeléctrico de radioisótopos |
| Radiokompass | Radio Direction Finder |
| radiological | radiológico |
| radiologist | radiólogo |
| radiology | radiología |
| Radiometric dating | Datación radiométrica |
| Radionetwork | Red inalámbrica |
| Radionics | Radiónica |
| radionuclide | radionúclido |
| Radiosity | Radiosidad |
| radiotelephone | radioteléfono |
| Radiotelevisione Svizzera di lingua Italiana | Radiotelevisione svizzera di lingua italiana |
| Radiotelevisión Andaluza | Radio y Televisión de Andalucía |
| Radiotelevizija Slovenija | Radiotelevizija Slovenija |
| radiotherapy | radioterapia |
| Radiowave | Onda de radio |
| radish | rábano |
| radium | radio |
| radius | radio |
| radix | raiz |
| Radix sort | Radix sort |
| Radjah Shelduck | Tadorna radjah |
| Radolfzell | Radolfzell am Bodensee |
| Radomir Antić | Radomir Antić |
| radon | radón |
| Radon fluoride | Fluoruro de radón |
| Radon transform | Transformada de Radon |
| Radostin Kishishev | Radostin Kishishev |
| Radosław Majdan | Radosław Majdan |
| Radosław Sikorski | Radosław Sikorski |
| Radosław Sobolewski | Radosław Sobolewski |
| Radovan Karadžić | Radovan Karadžić |
| Radovan Vlatkovic | Radovan Vlatkovic |
| Radu Sîrbu | Radu Sârbu |
| Raducz | Raducz |
| Rae Commune | Granizo |
| Rae Parish | Granizo |
| Raekwon | Raekwon |
| Rael | Rael |
| Raetia | Recia |
| Raetic language | Idioma rético |
| RAF | RAF |
| RAF Fighter Command | Mando de Caza |
| Rafael | Rafael |
| Rafael Alberti | Rafael Alberti |
| Rafael Altamira y Crevea | Rafael Altamira |
| Rafael Benítez | Rafael Benítez |
| Rafael Caldera | Rafael Caldera |
| Rafael Carrera | Rafael Carrera y Turcios |
| Rafael Correa | Rafael Correa |
| Rafael de Nogales Méndez | Rafael de Nogales Méndez |
| Rafael del Riego | Rafael de Riego |
| Rafael Eitan | Rafael Eitan |
| Rafael Guerra Bejarano | Rafael Guerra |
| Rafael Guizar Valencia | Rafael Guízar y Valencia |
| Rafael Kubelík | Rafael Kubelík |
| Rafael Merry del Val | Rafael Merry del Val |
| Rafael Moreno Aranzadi | Rafael Moreno Aranzadi |
| Rafael Márquez | Rafael Márquez |
| Rafael Nadal | Rafael Nadal |
| Rafael Osuna | Rafael Osuna |
| Rafael Paasio | Rafael Paasio |
| Rafael Pascual | Rafael Pascual |
| Rafael Puyana | Rafael Puyana |
| Rafael Sabatini | Rafael Sabatini |
| Rafael Sánchez Guerra | Rafael Sánchez-Guerra |
| Rafael Sóbis | Rafael Sóbis |
| Rafael Trujillo | Rafael Leónidas Trujillo |
| Rafael Urdaneta | Rafael José Urdaneta Farías |
| Rafael van der Vaart | Rafael van der Vaart |
| Rafaela | Rafaela |
| Rafeiro do Alentejo | Rafeiro do Alentejo |
| Raffaele Cadorna | Raffaele Cadorna |
| Raffaele Riefoli | Raffaele Riefoli |
| Raffaella Carrà | Raffaella Carrà |
| raffia | rafia |
| raffish | disoluto |
| raffle | rifa |
| raffle off | rifar |
