| Republika Srpska | Republika srbska |
| Requiem | Rekvijem |
| RER | Regionalna železnica |
| Reroute to Remain | Reroute To Remain |
| Rerum Novarum | Rerum novarum |
| rescue service | reševalna služba |
| rescue system | reševalni sistem |
| research | raziskava |
| research centre | raziskovalno središče |
| research of the effects | preučevanje vplivov |
| research policy | raziskovalna politika |
| research project | raziskovalni projekt |
| reserve | rezervat |
| Reserve team | Oddelek |
| Resia | Rezija |
| residential area with traffic calmings | stanovanjsko območje s hitrostnimi ovirami |
| residential building | stanovanjska zgradba |
| residual amount of water | preostala voda |
| residual pesticide | ostanki pesticidov |
| residual risk | preostalo tveganje |
| residual waste | preostali odpadki |
| residual waste sludge | ostanki odpadnega blata |
| residue analysis | analiza ostankov |
| residue of grinding | ostanki pri mletju |
| residue recycling | recikliranje ostankov |
| resin | smola |
| resinous plant | smolnata rastlina |
| resistance | odpornost |
| resistor | upornik |
| resolution | odločitev |
| resorption | vpijanje |
| resource | vir |
| resource allotment | dodelitev |
| resource appraisal | ocena virov |
| resource exploitation | izkoriščanje virov |
| resource reserve | zaloge virov |
| Resource Silo | Skladišča |
| resource utilisation | raba naravnih virov |
| resources | vir |
| resources management | gospodarjenje z viri |
| respiration | dihanje |
| respiratory air | vdihani in izdihani zrak |
| Respiratory chain | Dihalna veriga |
| respiratory disease | bolezen dihal |
| respiratory system | dihalni sistem |
| rest area | počivališče |
| restaurant | restavracija |
| restoration | restavriranje |
| restore | restavrirati |
| restrictive | omejevalen |
| Retail sales | Maloprodaja |
| retaining reservoir | vodna akumulacija |
| retina | mrežnica |
| Retinol | Vitamin A |
| Retrograde analysis | Retrogradna analiza |
| Retrograde and direct motion | Vzvratno gibanje |
| return | vrnitev |
| Reusable launch system | Raketoplan |
| Revelation | Razodetje |
| Revelation Space | Neskončnost |
| revenge | maščevanje |
| Reverend | Duhovnik |
| reverse osmosis | reverzna osmoza |
| Reversi | Othello |
