| Meaning | Category |
| Radio Habana Cuba | Community->Media |
| Red Hawk Corporation | Business->Firms |
| Residence Hall Council | Academic & Science->Universities |
| Residence Halls Counsel | Academic & Science->Universities |
| Respiration Has Ceased | Medical->Physiology |
| Reviews, Hints, and Cheats | Community->Sports Academic & Science->Universities |
| Right Hand Circular | Governmental->NASA |
| Rotation Hand Controller | Governmental->NASA |
| Rural Health Clinic | Medical->Hospitals |
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