| Rex | Rex |
| Rex Sacrorum | Rex Sacrorum |
| Rexism | Rex |
| REXX | Rexx |
| Rey Commission | Lijst van Europese Commissies |
| Reykjahlíð | Reykjahlíð |
| Reykjanes | Reykjanes |
| Reykjanesbær | Reykjanesbær |
| Reykjavik | reykjavik |
| Reykjaviker | Reykjaviker |
| Reykjavík Airport | Luchthaven Keflavik |
| Reykárhverfi | Hrafnagil |
| Reynard | Reinaart |
| Reynolds number | Getal van Reynolds |
| Reza Abbasi | Reza Abbasi |
| Reza Shah | Reza Pahlavi |
| Rezh | Rezj |
| Reşiţa | Reşiţa |
| RFS Vladimir Monomakh | Vladimir Monomach |
| RFS Yury Dolgoruky | Joeri Dolgoroeki |
| RGB | RGB kleursysteem |
| RGB color model | RGB-kleursysteem |
| RGB color space | RGB-kleursysteem |
| Rh disease | Resusantagonisme |
| Rh factor | resusfactor |
| Rhabdodon | Rhabdodon |
| Rhabdomys | Streepmuizen |
| Rhacodactylus | Rhacodactylus |
| Rhacophoridae | Schuimnestboomkikkers |
| Rhacophorus | Rhacophorus |
| Rhacophorus nigropalmatus | Zwartvoetboomkikker |
| Rhadamanthus | Rhadamanthys |
| Rhade | Rhade |
| Rhaetia | Raetia |
| Rhaetian | Rhaetien |
| Rhaetian Alps | Rätische Alpen |
| Rhaetian languages | Retoromaans |
| Rhaeto-Romance | Retoromaans |
| Rhaeto-Romance languages | Retoromaans |
| Rhamnaceae | Wegedoornfamilie |
| Rhamnales | Rhamnales |
| Rhamnus | Sporkehout |
| Rhamnus cathartica | Wegedoorn |
| Rhampholeon | Brookesia |
| Rhamphorhynchoidea | Rhamphorhynchoidea |
| Rhamphorhynchus | Rhamphorhynchus |
| Rhapidophyllum hystrix | Rhapidophyllum hystrix |
| Rhapsode | Rapsode |
| rhapsodic | rapsodisch |
| Rhapsodist | Rapsode |
| rhapsody | rapsodie |
| Rhapsody in Blue | Rhapsody in Blue |
| Rhapsody of Fire | Rhapsody of Fire |
| Rhapsody on a Theme of Paganini | Rapsodie op een thema van Paganini |
| Rhauderfehn | Rhauderfehn |
| Rhaunen | Rhaunen |
| RhB | Rhätische Bahn |
| rhea | nandoe |
| Rhea Silvia | Rhea Silvia |
| rhebok | reebokantilope |
| Rheda-Wiedenbrück | Rheda-Wiedenbrück |
| Rhede | Rhede |
