| Rezovo River | Rezowska Reka |
| Rezső Seress | Rezső Seress |
| Reşiţa | Reşiţa |
| RFID | RFID |
| RFP Request for Proposal | Zapytanie ofertowe |
| RFS Vladimir Monomakh | Włodzimierz II Monomach |
| RFS Yury Dolgoruky | Jerzy Dołgoruki |
| RG Veda | RG Veda |
| RGB | RGB |
| RGB color model | RGB |
| RGB color space | RGB |
| Rh | Rod |
| Rhabditida | Rhabditida |
| rhabdomyolysis | rabdomioliza |
| Rhabdoviridae | Rabdowirusy |
| Rhacophoridae | Żaby latające |
| Rhadamanthus | Radamantys |
| Rhaetia | Recja |
| Rhaetian | retyk |
| Rhaetian Alps | Alpy Retyckie |
| Rhaetian languages | Języki retoromańskie |
| Rhaeto-Romance | Język romansz |
| Rhaeto-Romance languages | Języki retoromańskie |
| Rhamnus cathartica | Szakłak pospolity |
| Rhamphorhynchoidea | Ramforynchy |
| Rhamphorhynchus | Ramforynch |
| Rhaphigaster nebulosa | Rhaphigaster nebulosa |
| Rhapsode | Rapsod |
| Rhapsody in Blue | Błękitna rapsodia |
| Rhapsody of Fire | Rhapsody of Fire |
| rhea | nandu |
| Rhea Silvia | Rea Sylwia |
| Rheims | Reims |
| Rhein | Ren |
| Rhein-Erft-Kreis | Powiat Rhein-Erft |
| Rhein-Hunsrück | Powiat Rhein-Hunsrück |
| Rhein-Kreis Neuss | Rhein-Kreis Neuss |
| Rhein-Lahn-Kreis | Powiat Rhein-Lahn |
| Rhein-Neckar-Kreis | Powiat Rhein-Neckar |
| Rhein-Pfalz-Kreis | Powiat Rhein-Pfalz |
| Rhein-Sieg | Powiat Rhein-Sieg |
| Rheinau | Rheinau |
| Rheine | Rheine |
| RheinEnergieStadion | RheinEnergieStadion |
| Rheinfelden | Rheinfelden |
| Rheingau-Taunus-Kreis | Powiat Rheingau-Taunus |
| Rheinhausen | Rheinhausen |
| Rheinisch-Bergischer Kreis | Rheinisch-Bergischer Kreis |
| Rheinmünster | Rheinmünster |
| Rheinpark Stadion | Rheinpark Stadion |
| Rheinstetten | Rheinstetten |
| Rhen - the | Ren |
| rhenium | ren |
| Rhesus blood group system | Rh |
| Rhesus factor | Rh |
| Rhetoric | Retoryka |
| rhetorical | retoryczny |
| rhetorical device | figura retoryczna |
| rhetorical question | pytanie retoryczne |
| rheum | katar |
| Rhin | Ren |
| Rhinanthus angustifolius | Szelężnik większy |
| Rhind Mathematical Papyrus | Papirus Matematyczny Rhind |
| Rhine | Ren |
| Rhine Falls | Rheinfall |
| Rhine Province | Nadrenia |
| Rhine-Main S-Bahn | S-Bahn Ren-Men |
| Rhineland | Nadrenia |
| Rhineland-Palatinate | Nadrenia-Palatynat |
| rhino | nosorożec |
