| River Phoenix | River Phoenix |
| River Plate | La Plata |
| River Severn | Severn |
| River Shannon | Sionna |
| River shark | Glyphis |
| River Sirion | Sirion |
| River Spey | Spey |
| River Stour | River Stour |
| River Taff | Taff |
| River Tamar | Tamar |
| River Tay | Tay |
| River Tees | Tees |
| River Thames | Tamiza |
| River Tigris | Tygrys |
| River Torrens | Torrens |
| River Trent | Trent |
| River Tweed | Tweed |
| River Tyne | Tyne |
| River Usk | Usk |
| river water | woda rzeczna |
| River whaler | Żarłacz tępogłowy |
| River Wye | Wye |
| Rivera | Rivera |
| Rivera Department | Rivera |
| Riverboarding | Hydrospeed |
| Riverine Rabbit | Zając rzeczny |
| Rivers of Babylon | Rivers of Babylon |
| Rivers of Middle-earth | Erui |
| Rivers of Romania | Rzeki Rumunii |
| Rivers State | Rivers |
| Riverside International Raceway | Riverside |
| rivet | nit |
| Riviera | Wybrzeże Lazurowe |
| Rivière | Rivière |
| Rivières | Rivières |
| Rivne | Równe |
| Rivne Nuclear Power Plant | Elektrownia Jądrowa Równe |
| Rivne Oblast | Obwód rówieński |
| Rivoli | Rivoli |
| Rivulidae | Strumieniakowate |
| Rix-Trébief | Rix |
| Riyad Province | Ar-Rijad |
| Riyadh | Rijad |
| Riyadh Province | Ar-Rijad |
| riyal | rial |
| Riyo Mori | Riyo Mori |
| Rize Province | Rize |
| Rizhsky Rail Terminal | Dworzec Ryski |
| RLC circuit | Obwód RLC |
| RLE | RLE |
| Rlogin | Rlogin |
| RM | Rm |
| RMS | Wartość skuteczna |
| RMS Aquitania | Akwitania |
| RMS Britannic | HMHS Britannic |
| RMS Carpathia | RMS Carpathia |
| RMS Lusitania | RMS Lusitania |
| RMS Mauretania | RMS Mauretania |
| RMS Niagara | Niagara |
| RMS Olympic | RMS Olympic |
| RMS Queen Mary | RMS Queen Mary |
| RMS Titanic | RMS Titanic |
| RMVB | RMVB |
| RMX | IRMX |
| Rn | Radon |
| RNA | Kwasy rybonukleinowe |
| RNA editing | Edytowanie RNA |
| RNA interference | Interferencja RNA |
| RNA polymerase | Polimeraza RNA |
| RNA virus | Wirusy RNA |
| RNA world hypothesis | Świat RNA |
| Ro ro ship | Prom |
| Ro ro vessel | Prom |
| ROA | ROA |
| roach | karaluch |
| road | droga |
| Road bicycle racing | Kolarstwo |
| Road bike | Rower szosowy |
| Road finisher | Rozścielacz do asfaltu |
| Road finishing machine | Rozścielacz do asfaltu |
| road guard | pachołek |
| road hog | pirat drogowy |
| road network | sieć drogowa |
| Road of Bones | Kołyma |
| road roller | walec |
| Road safety camera | Radar |
| road salt | sól do posypywania dróg |
| road sign | znak drogowy |
| Road to Avonlea | Droga do Avonlea |
| Road to Perdition | Droga do Zatracenia |
| Road Town | Road Town |
| Road transport | Ruch drogowy |
| Road-rule enforcement camera | Radar |
| roadblock | barykada |
| Roadian | road |
| roadmap | mapa drogowa |
| Roadroller | Walec |
| Roadrunner Records | Roadrunner Records |
| Roads and expressways in Poland | Autostrady w Polsce |
| roadside | pobocze |
| roadside bomb | fugas |
| roadside hawk | myszołów krzykliwy |
| Roadside Picnic | Piknik na skraju drogi |
| Roadsted | Reda |
| roadway | jezdnia |
| Roadworks | Ostatni bastion Barta Dawesa |
| Roald Amundsen | Roald Amundsen |
| Roald Dahl | Roald Dahl |
| Roald Hoffmann | Roald Hoffmann |
| roan | krasula |
| Roane County | Hrabstwo Roane |
| Roanne | Roanne |
