| rescision | repeal |
| rescousse | rescue |
| Research and Analysis Wing | Research and Analysis Wing |
| Research Consortium on Nearby Stars | Research Consortium on Nearby Stars |
| Research Triangle Park | Research Triangle Park |
| Reseau | Raetians |
| Reseau annulaire | Grating ring |
| Reseau de detecteurs | Detector arrays |
| Reseau de diffraction | Diffraction gratings |
| Reseau de diodes | Diode arrays |
| Reseau de neurones | Artificial neural network |
| Reseau de telescopes | Telescope arrays |
| Reseau Echelle | Echelle gratings |
| Reseau objectif | Objective gratings |
| Reseau par reflexion | Reflection gratings |
| Reseau par transmission | Transmission gratings |
| Reseau phase | Phased arrays |
| Resedaceae | Resedaceae |
| Reserve Officers and Training Corps | Reserve Officer Training Corps |
| Reservoir Dogs | Reservoir Dogs |
| Resia | Resia |
| Resident Evil | Resident Evil |
| Resident Evil Zero | Resident Evil Zero |
| Resolution spectrale | Spectral resolution |
| resort | resort |
| Resource Access Control Facility | IBM Resource Access Control Facility |
| Resource Description Framework | Resource Description Framework |
| Resource Interchange File Format | Resource Interchange File Format |
| respect | respect |
| respect de soi | pride |
| respect de soi-même | self-respect |
| respectabilité | respectability |
| respectable | reputable |
