| Luftklappe | damper |
| Luftblase | bubble air pocket bleb bubble of air |
| Luftkampf | dogfight |
| Luftlager | air bearing |
| Luftmasse | air mass |
| luftmasse | airmass |
| Luftlinie | as the crow flies beeline |
| Luftpumpe | air pump Antlia |
| Luftwaffe | air force |
| Lüftungsklappe | air shutter air valve ventilation flap |
| Augenklappe | eye patch |
| Filmklappe | clapperboard |
| Heckklappe | tailgate boot |
| klappe | cut |
| Klappe | flap mouth |
| Babyklappe | baby flap baby hatch |
| Herzklappe | heart valve |
| Julklapp | Christmas |
| Landeklappe | flap |
| Fußkappe | foot cap |