| Blaubirke | blue birch |
| Blaubart | Bluebeard |
| Blaumerle | blue rock thrush |
| Blaubeere | blueberry bilberry |
| Blaumiese | blues |
| Blauracke | European roller |
| Gläubige | believer |
| Blaublüter | blue blood |
| Blaufisch | bluefish |
| Blauzunge | blue-tongue lizard |
| Bläue | blueness |
| blaugrau | blue-gray |
| Blaualge | cyanobacteria cyanophyta |
| Blaukissen | aubrieta |
| Blaulicht | emergency flashing light flashing lights |
| Blaumeise | blue tit |
| Blaupause | blueprint |
| Blausäure | hydrogen cyanide prussic acid hydrocyanic acid |
| Bläuling | gossamer-winged butterfly |
| blaugrün | blue-green teal |