| Rettificatore vibrante | Jitterbug-type sander |
| rettile | crawler |
| rettili | reptile |
| rettilineo | rectilinear |
| rettitudine | virtuousness |
| retto | honorable |
| retto superiore | superior rectus |
| rettore | vice-chancellor |
| Return on assets | Return on assets |
| Return on equity | Return on equity |
| Return on sales | Return on sales |
| Return to Apocalyptic City | Return to the Apocalyptic City |
| retuso | retuse |
| Retz | Retz |
| Retzbach | Retzbach |
| Retzstadt | Retzstadt |
| Retzwiller | Retzwiller |
| REU | REU |
| Reuben Fine | Reuben Fine |
| reumatico | rheumatic |
