| |||
| double; twofold | |||
| |||
| in duplicate (Dokumente); twice | |||
| duplex; binary | |||
| duplicate | |||
| two-fold | |||
| double; twin | |||
| |||
| bi | |||
| |||
| double-cross hybrid | |||
| |||
| dual; twofold; twofoldly | |||
|
Zweifach : 150 phrases in 40 subjects |
| Agriculture | 6 |
| Alternative dispute resolution | 1 |
| American usage, not spelling | 1 |
| Automated equipment | 1 |
| Business | 1 |
| Chemistry | 4 |
| Communications | 1 |
| Computers | 4 |
| Construction | 9 |
| Cycle sport | 1 |
| Diplomacy | 1 |
| Drives | 1 |
| Economics | 2 |
| Electronics | 5 |
| Engines | 5 |
| Fencing | 1 |
| Finances | 1 |
| Foreign trade | 1 |
| General | 14 |
| Industry | 3 |
| Information technology | 4 |
| Law | 1 |
| Mathematics | 5 |
| Mechanic engineering | 4 |
| Medical | 1 |
| Medical appliances | 2 |
| Microelectronics | 4 |
| Optics branch of physics | 25 |
| Packaging | 1 |
| Pharmacy and pharmacology | 1 |
| Physics | 6 |
| Polygraphy | 3 |
| Power lines | 2 |
| Power system protection | 1 |
| Racing and motorsport | 2 |
| Radiation | 1 |
| Refrigeration | 2 |
| Statistics | 3 |
| Technology | 17 |
| Transport | 2 |