| Blattauge | leaf bud |
| blättrig | flaky |
| Blamage | disgrace |
| Blattader | leaf vein nerve vein |
| Blattgalle | leaf gall |
| Blattlaus | aphid greenfly |
| Blattnase | leaf-nosed bat leafnose bat |
| Blattranke | leaf tendril |
| Blaualge | cyanobacteria cyanophyta |
| Blaupause | blueprint |
| Blausäure | hydrogen cyanide prussic acid hydrocyanic acid |
| Blutsauger | gadfly vampire sucker bloodsucker |
| Glasauge | glass eye |
| Blutzeuge | martyr |
| Blasdüse | tuyere |
| Blattern | smallpox |
| blättern | leaf through riffle flick through page through thumb flake flake off put down defoliate unleaf unleave |
| Blattfloh | psyllid |
| Blattstiel | petiole |
| Blauzunge | blue-tongue lizard |