| Rubrum | caption |
| Rubrik | rubric |
| Hubraum | piston displacement pistone swept volume |
| Subraum | hyperspace subspace |
| Quorum | quorum |
| Utrum | common gender |
| Ruben | Reuben |
| Rübsen | canola |
| Rüebli | carrot |
| Rubel | rouble rubl |
| Rubidium | rubidium |
| Rubin | ruby |
| Rübe | beet turnip |
| Zubrot | by-meat extra bit extra bit on the side extra crust |
| übrig | remaining |
| Brun | Brown |
| Elbrus | Elbrus |
| Brut | incubation |
| brut | brut |
| Drumium | Drumian |