| Rhun Hir ap Maelgwn | Rhun Hir ap Maelgwn |
| Rhyacien | Rhyacian |
| Rhyacotritonidae | Torrent salamander |
| Rhynchocalycaceae | Rhynchocalyx |
| Rhynchocephalia | Sphenodontia |
| Rhynchocyon | Golden-rumped Elephant Shrew |
| Rhynchocyon chrysopygus | Rhynchocyon chrysopygus |
| Rhyncholestes raphanurus | Long-nosed Shrew Opossum |
| Rhynchée de Saint-Hilaire | Lesser Painted Snipe |
| Rhyniophytes | Rhyniophyta |
| Rhys ap Gruffydd | Rhys ap Gruffydd |
| Rhys ap Tewdwr | Rhys ap Tewdwr |
| Rhythm and blues | Rhythm and blues |
| Rhythmophone | Rhythmophone |
| Rhytme | Rhythm |
| Rhäzüns | Rhäzüns |
| rhème | rheme |
| Rhètes | Raetians |
| Rhéa | Rhea |
| Rhéa Silvia | Rhea Silvia |
| Rhée | Rhea |
| rhénan | Rhenish |
| Rhénane | Rhineland |
| Rhénanie | Rhineland |
| Rhénanie-du-Nord-Westphalie | North Rhine-Westphalia |
| Rhénanie-Palatinat | Rhineland-Palatinate |
| rhénium | rhenium |
| rhéologie | rheology |
| rhéomètre | rheometer |
| rhéostat | rheostat |
| Rhésos | Rhesus of Thrace |
| Rhésus négatif | Rhesus negative |
| Rhésus positif | Rhesus positive |
| Rhétie | Raetia |
| rhétorique | eloquence |
| rhétoriquement | rhetorically |
| Rhêmes-Saint-Georges | Rhêmes-Saint-Georges |
| rhô | rho |
| Rhône | Rhone |
| Rhône-Alpes | Rhône-Alpes |
| Rhön | Rhön Mountains |
| Ria Baran | Ria Baran |
| RIA Novosti | RIA Novosti |
| Riad | Riyadh |
| rial | rial |
| Rial iranien | Iranian rial |
| Rial qatari | Qatari riyal |
| Rial yéménite | Yemeni rial |
| Rians | Rians |
| riant | bright |
| Rianxo | Rianxo |
| Riau | Riau |
| Riaz | Riaz |
| Riazan | Ryazan |
| Riba-roja de Túria | Riba-roja de Túria |
| Ribe | Ribe County |
| Ribeira Grande | Ribeira Grande |
| Ribera Baixa | Ribera Baixa |
