| Blausäure | hydrogen cyanide prussic acid hydrocyanic acid |
| Blaupause | blueprint |
| Blasdüse | tuyere |
| Blaubart | Bluebeard |
| Blaustern | squill |
| blaues Auge | black eye |
| Blattauge | leaf bud |
| Blaualge | cyanobacteria cyanophyta |
| Blaubeere | blueberry bilberry |
| Blauracke | European roller |
| Lausanne | Lausanne |
| Lausbube | urchin |
| Klausur | enclosure exam test |
| Borsäure | boric acid |
| Butansäure | butanoic acid |
| Glasauge | glass eye |
| Kleesäure | oxalic acid |
| Oxalsäure | oxalic acid |
| Ölsäure | oleic acid |
| Blasform | blow mould |