1. Kalligraphie   economics   sociology   calligraphy   astrology   Hint Half-n-half Clue   2. Entomologie   accountancy   entomology   radiology   telepathy   Half-n-half Clue   3. Rheologie   rheology   ornithology   telepathy   aeronautics   Half-n-half Clue   4. Telegraphie   archeology, archaeology   telegraphy   telepathy   seismology   Half-n-half Clue   5. Ätiologie   entomology   etiology, aetiology   radiology   telegraphy   Half-n-half Clue   6. Aeronautik   economics   etiology, aetiology   archeology, archaeology   aeronautics   Half-n-half Clue   7. Astrologie   entomology   theology   astrology   sociology   Half-n-half Clue