| Blutsfreund | blood relation |
| Blutsfreundin | blood relation |
| Hausfreund | friend of the family cicisbeo gallant |
| Baumfreund | philodendron |
| Bluescreen | blue screen of death |
| Blutschuld | bloodguilt |
| Bluthund | Bloodhound |
| Blutspende | blood donation |
| Brieffreund | pen pal penfriend |
| Busenfreund | bosom buddy bosom friend |
| Blutfehde | vendetta |
| Blutsbande | blood |
| Blutsbruder | blood brother |
| Blutstillung | hemostasis |
| Blutstrom | bloodstream |
| blutsverwandt | consanguineous |
| bluttriefend | sanguinolent |
| blutverwandt | cognate |
| blühend | prosperous |
| Blutarmut | anaemia |