| Rubinrot | ruby |
| rubinrot | ruby |
| Rubikon | Rubicon |
| Rubin | ruby |
| Weinrot | burgundy |
| weinrot | burgundy claret wine-red |
| Zubrot | by-meat extra bit extra bit on the side extra crust |
| Ruben | Reuben |
| Rubrum | caption |
| Rubellit | rubellite |
| Rubidium | rubidium |
| Rubrik | rubric |
| Kubist | Cubist |
| Qubit | qubit |
| Tübingen | Tübingen |
| Tubist | tubist |
| dubios | doubtful dubious shady |
| subito | at once |
| Rabbinat | rabbinate |
| Robin | Robin |