1. Entomologie   accountancy   choreography   entomology   sociology   Hint Half-n-half Clue   2. Theologie   ornithology   theology   aeronautics   telegraphy   Half-n-half Clue   3. Aeronautik   theology   topology   aeronautics   choreography   Half-n-half Clue   4. Telegraphie   telegraphy   calligraphy   economics   topology   Half-n-half Clue   5. Seismologie   anthropology   ornithology   etiology, aetiology   seismology   Half-n-half Clue   6. Topologie   topology   economics   seismology   entomology   Half-n-half Clue   7. Radiologie   etiology, aetiology   archeology, archaeology   cosmetology   radiology   Half-n-half Clue