| radiologista | radiographer |
| radionuclídeos | radionuclide |
| radiotelefone | radiotelephone |
| Radiotelescópio | Radio telescope |
| Radiotelescópio de Arecibo | Arecibo Observatory |
| Radiotelevisão Portuguesa | Rádio e Televisão de Portugal |
| radioterapia | radiotherapy |
| RADIUS | Radius |
| Radix sort | Radix sort |
| radiância | radiance |
| Radiômetro de Crookes | Crookes radiometer |
| Radnički Niš | FK Radnički Niš |
| Radolfzell | Radolfzell |
| Radon | Radon |
| Radoslav Kováč | Radoslav Kováč |
| Radosław Matusiak | Radosław Matusiak |
| RADSL | Rate-Adaptive Digital Subscriber Line |
| radão | radon |
| Radøy | Radøy |
| Rae Dawn Chong | Rae Dawn Chong |
| Raekwon | Raekwon |
| Raesfeld | Raesfeld |
| RAF | RAF |
| Rafael | Raphael |
| Rafael Augusto Sóbis | Rafael Sóbis |
| Rafael Benítez | Rafael Benítez |
| Rafael Bustillo | Rafael Bustillo Province |
| Rafael Caldera Rodríguez | Rafael Caldera |
| Rafael Correa | Rafael Correa |
| Rafael de Riego | Rafael del Riego |
| Rafael Grzelak | Rafał Grzelak |
| Rafael Márquez | Rafael Márquez |
| Rafael Nadal | Rafael Nadal |
| Rafael Sanzio | Raphael |
| Rafael van der Vaart | Rafael van der Vaart |
| Rafaela | Rafaela |
| Rafflesia arnoldii | Rafflesia arnoldii |
| Rafflesiaceae | Rafflesiaceae |
| Rafik Khachatryan | Rafik Khachatryan |
| Raflésia | Rafflesia |
| Raga | Rāga |
| Rage Against the Machine | Rage Against the Machine |
| Ragga | Ragga |
| Raging Bull | Raging Bull |
| Ragnar Anton Kittil Frisch | Ragnar Anton Kittil Frisch |
| Ragnar Arthur Granit | Ragnar Granit |
| Ragnar Lodbrok | Ragnar Lodbrok |
| Ragnarok | Ragnarok |
| Ragnarok The Animation | Ragnarok the Animation |
| Ragnarök | Ragnarök |
| Ragnarök Online | Ragnarok Online |
| Ragnhild da Noruega | Princess Ragnhild of Norway |
| Ragnvaldo da Suécia | Ragnvald Knaphövde |
| ragtime | ragtime |
| ragu | hodgepodge |
| Ragunda | Ragunda Municipality |
| Ragusa | Dubrovnik |
| Rahat | Rahat |
| Rahden | Rahden |
| Rahim Yar Khan | Rahimyar Khan |
| Rahula | Rahula |
| Rai Due | Rai Due |
| Rai Uno | Rai Uno |
| raia | streak |
| raiado | veined |
| raiano | borderer |
| raiar do sol | daybreak |
| Raich | Raich |
| RAID | RAID |
| Raiders of the Lost Ark | Raiders of the Lost Ark |
| raigota | hangnail |
| Raimon Panikkar | Raimon Panikkar |
| Raimundo de Borgonha | Raymond of Burgundy |
| Raimundo de Madrazo y Garreta | Raimundo de Madrazo y Garreta |
| Raimundo de Penaforte | Raymond of Peñafort |
| Raimundo de Poitiers | Raymond of Antioch |
| Raimundo Ferreira Ramos Júnior | Júnior Baiano |
| Raimundo IV de Toulouse | Raymond IV of Toulouse |
| Raimundo Lúlio | Ramon Llull |
| Raimundo Pedrosa | Raimundo Pedrosa |
| Rain Man | Rain Man |
| Rain of a Thousand Flames | The Dark Secret |
| Rainau | Rainau |
| Rainbow | Rainbow |
| Rainbow Warrior | Rainbow Warrior |
| Raine McCorquodale | Raine de Chambrun |
| Rainer Maria Rilke | Rainer Maria Rilke |
| Rainer Werner Fassbinder | Rainer Werner Fassbinder |
| Rainer Wolfcastle | Rainier Wolfcastle |
| rainha | know-it-all |
| rainha da cocada preta | know-it-all |
| Rainha de Sabá | Queen of Sheba |
| rainha mãe | queen mother |
| rainha-cláudia | greengage |
| rainout | rainout |
| raio | beam |
