| RPM Package Manager | RPM Package Manager |
| RR Lyrae star | Estrellas RR Lyrae |
| RR Telescopii star | Estrellas RR Telescopii |
| RRA star | Estrella RRA |
| RRAB star | Estrella RRAB |
| RRB star | Estrella RRB |
| RRC star | Estrella RRC |
| RRDtool | RRDtool |
| rRNA | ARNr |
| Rrose Sélavy | Marcel Duchamp |
| RS Canum Venaticorum star | Estrellas RS Canum Venaticoru |
| RS Gimnástica de Torrelavega | Gimnástica de Torrelavega |
| RSA | RSA |
| RSA Factoring Challenge | Competición de factorización RSA |
| RSA number | Competición de factorización RSA |
| RSA Security | RSA Security |
| RSD Alcalá | Real Sociedad Deportiva Alcalá |
| RSHA | Oficina Central de Seguridad del Reich |
| RSS | RSS |
| RST | Reset |
| rsvp | se ruega la respuesta |
| Rta | Rita |
| RTBF | Radio Télévision Belge de la Communauté Française |
| RTFM | RTFM |
| RTU | UTR |
| RTVE | Radiotelevisión Española |
| RUAG Ranger | Programa Ranger |
| Ruaha National Park | Parque Nacional Ruaha |
| Ruanda | Ruanda |
| rub | frotar |
| rub down | secarse frotando |
| Rub El Hizb | Estrella tartésica |
| rub out | raspar |
| rub salt in the wound | frotar sal en la herida |
| Rubarb | Rheum rhabarbarum |
| rubber | caucho |
| rubber band | liga elástica |
| Rubber boom | Fiebre del caucho |
| rubber boot | bota de agua |
| rubber dinghy | bote de goma |
| rubber plant | gomero |
| rubber tree | gomero |
| rubberize | cauchutar |
| rubbernecker | mirón |
| rubbers | chanclos |
| rubbery | elástico |
| rubbing | frotamiento |
| rubbing alcohol | alcohol desinfectante |
| rubbish | desperdicios |
| rubbish tip | basurero |
| Rubbishy film | Brassica rapa |
| rubble | restos |
| Rube Goldberg machine | Máquina de Rube Goldberg |
| rubella | rubéola |
| Ruben Boumtje-Boumtje | Ruben Boumtje-Boumtje |
| Ruben Gallego | Rubén Gallego |
| Rubens Barrichello | Rubens Barrichello |
| Rubeus Hagrid | Rubeus Hagrid |
| Rubiaceae | Rubiaceae |
| Rubicon | Río Rubicón |
| rubicund | rubicundo |
| rubicundity | rubor |
| rubidium | rubidio |
| Rubielos de Mora | Rubielos de Mora |
| Rubigen | Rubigen |
| Rubik's cube | cubo de Rubik |
| Rubin | Rubí |
| Rubin Design Bureau | Rubí |
