| U-Boot | sub |
| E-Book | e-book |
| Reboot | reboot |
| Boot | boat boot |
| U-Boot-Fahrt | underway |
| U-Bahn | underground subway metro metro car |
| X-Box | Xbox |
| -borg | -boro -borough -burgh -bury |
| W-Boson | W boson |
| Z-Boson | Z boson |
| Beiboot | cutter |
| Boost | boost |
| Catboot | catboat |
| Haboob | haboob |
| iBook | iBook |
| Boom | boom |
| Flugboot | seaplane |
| Hausboot | houseboat |
| Mähboot | aquatic weed harvester cutting boat |
| H-Bombe | H-bomb |