| ritual | rito |
| ritualism | ritualismo |
| ritualist | ritualista |
| ritualistic | ritualista |
| ritualistically | ritualisticamente |
| ritually | ritualmente |
| Ritz Hotel | Hôtel Ritz Paris |
| ritzy | chique |
| Riva | Riva |
| Riva San Vitale | Riva San Vitale |
| Rivadavia Partido | Rivadavia |
| rival | antagonista |
| Rivaldo | Rivaldo Vitor Borba Ferreira |
| rivaling | rival |
| rivallate | rivali |
| rivalling | rival |
| rivalry | competição |
| rivalryuarrel | rivalidade |
| Rivas | Rivas |
| Rivaz | Rivaz |
| Rivendell | Rivendell |
| river | rio |
| River Aire | Rio Aire |
| River Atlético Clube | Ríver Atlético Clube |
| River Avon | Avon |
| River Bann | Ban |
| River Barrow | Barrow |
| river bed | leitos de rios |
| River bifurcation | Bifurcação fluvial |
| River Calder | Rio Calder |
| River Clyde | Clyde |
| River Coquet | Vezin-le-Coquet |
| River delta | Delta |
| River Don | Rio Don |
| River horses | Hipopótamo |
| River Kelvin | Kelvin |
| River Lee | Lea |
| River Lethe | Lete |
| River Liffey | Liffey |
| River Ness | Nesso |
| River Nile | Rio Nilo |
| River Nore | Film noir |
| River out of Eden | O Rio que Saía do Éden |
| River Phoenix | River Phoenix |
| River Plate | Rio da Prata |
| River Severn | Rio Severn |
| River Shannon | Rio Shannon |
| River Sirion | Sirion |
| River Suir | Rio Suir |
| River Thames | Rio Tâmisa |
| River Tigris | Rio Tigre |
| river water | água dos rios |
| River whaler | Carcharhinus leucas |
| Rivera | Rivera |
| Rivera Department | Departamento de Rivera |
| riveranate | rioxi |
| riverbed | leito fluvial |
| Riverdance | Riverdance |
| Riverense Portuñol | Portunhol |
| riverine | ribeirinho |
| Rivers of Beleriand | Barad Eithel |
| Rivers State | Rio |
| riverside | margem |
| rivet | cravo |
| riveting | rebitagem |
| Riviera | Riviera |
| Rivière | Rio |
| Rivière du Rempart | Rivière du Rempart |
| Rivne Oblast | Rivne |
| Rivoli | Rivoli |
| rivulet | riacho |
| Rivulidae | Rivulidae |
| Riyad Province | Ar Riyad |
| Riyadh | Riade |
| Riyadh Province | Ar Riyad |
| Riyo Mori | Riyo Mori |
| RL circuit | Circuito RL |
| RLC circuit | Circuito RLC |
| RLE | Codificação Run-length |
| RMS Aquitania | Aquitânia |
| RMS Britannia | RMS Britannia |
| RMS Britannic | HMHS Britannic |
| RMS Lusitania | RMS Lusitania |
| RMS Mauretania | RMS Mauretania |
| RMS Niagara | Niágara |
| RMS Olympic | RMS Olympic |
| RMS Queen Mary | RMS Queen Mary |
| RMS Titanic | RMS Titanic |
| RMVB | RMVB |
| Rn | Rádon |
| RNA | ARN |
| RNA interference | Rna de Interferência |
| RNA polymerase | ARN-polimerase |
| RNA virus | Vírus ARN |
| Ro ro ship | Balsa |
| Ro ro vessel | Balsa |
| roach | barão |
| roachion | guimbae |
| road | estrada |
| road agent (Old West slang) | salteador |
| Road bicycle racing | Ciclismo de estrada |
| road map | mapa |
| road metal | cascalho |
