| Rigid airship | Cepelin |
| Rigid body dynamics | Togo telo |
| Rigveda | Rigveda |
| Rijeka | Reka |
| Rila | Rila |
| Rila Monastery | Rilski samostan |
| Rimini | Rimini |
| Rinat Dasayev | Rinat Dasajev |
| Rinderkennzeichnungs- und Rindfleischetikettierungsüberwachungsaufgabenübertragungsgesetz | Najdaljša slovenska beseda |
| ring | prstan |
| ring finger | prstanec |
| Ring Nebula | Obročasta meglica |
| Ring of sets | Kolobar |
| Ringerike | Ringerike |
| Rings of Power | Vilinski prstani |
| Ringsaker | Ringsaker |
| Rio | Reka |
| Rio Bravo | Rio Grande |
| Rio de Janeiro | Rio de Janeiro |
| Rio Grande | Rio Grande |
| Risan | Risan |
| RISC | RISC |
| rising sea level | dviganje morske gladine |
| risk | tveganje |
| risk communication | izmenjava informacij o okoljskem tveganju |
| Risnjak National Park | Narodni park Risnjak |
| Risør | Risør |
| rite | obred |
| Rittmeister | Rittmeister |
| Riva | Riva |
| Rivaldo | Rivaldo |
| river | reka |
| River Aire | Površina |
| River Bann | Ban |
| river bed | rečna struga |
| River bifurcation | Bifurkacija |
| River delta | Delta |
| River Don | Don |
| River Kelvin | Kelvin |
| River Lee | Lee |
| River Nile | Nil |
| River Plate | Río de la Plata |
| River Spey | Spey |
| River Tigris | Tigris |
| river water | rečna voda |
| River whaler | Beli morski volk |
| Rivers of Beleriand | Aelin-uial |
| Rivers State | Reka |
| Riverside International Raceway | Riverside International Raceway |
| Riviera | Azurna obala |
| Rivière | Reka |
| Riyadh as-Saaliheen | Rijad al-Salihin |
| RK | RK |
| RM | RM |
| RMS Aquitania | Akvitanija |
| RMS Mauretania | Mavretanija |
| RMS Titanic | RMS Titanic |
| Rn | Radon |
| RNA | Ribonukleinska kislina |
| Ro ro ship | Trajekt |
| Ro ro vessel | Trajekt |
