1. Radiologie   etiology, aetiology   anthropology   radiology   economics   Hint Half-n-half Clue   2. Soziologie   ornithology   archeology, archaeology   radiology   sociology   Half-n-half Clue   3. Vogelkunde   entomology   economics   ornithology   calligraphy   Half-n-half Clue   4. Astrologie   theology   topology   telegraphy   astrology   Half-n-half Clue   5. Kosmetik   telegraphy   theology   cosmetology   accountancy   Half-n-half Clue   6. Rheologie   seismology   rheology   accountancy   cosmetology   Half-n-half Clue   7. Aeronautik   calligraphy   telepathy   telegraphy   aeronautics   Half-n-half Clue