| Luftnummer | flop washout |
| Lufthunger | shortness of breath |
| Luftpumpe | air pump Antlia |
| Flugnummer | flight number |
| Autonummer | license plate number |
| Lachnummer | laughing stock |
| Nullnummer | free first issue pilot issue |
| Luftlager | air bearing |
| Luftfilter | air filter |
| Luftrüssel | party horn |
| Lüfter | fan blower |
| Umluftkammer | air-recirculation chambers convection chamber |
| Zuluftkammer | supply air chamber |
| Atomnummer | atomic number |
| PIN-Nummer | PIN |
| E-Nummer | E number |
| Hausnummer | house number ballpark figure |
| Kontonummer | account number |
| Nummer | number |
| Trümmer | debris |