1. rhéologie   aeronautics   calligraphy   radiology   rheology   Hint Half-n-half Clue   2. ornithologie   astrology   radiology   ornithology   sociology   Half-n-half Clue   3. chorégraphie   telepathy   theology   choreography   anthropology   Half-n-half Clue   4. cosmétologie   astrology   telegraphy   entomology   cosmetology   Half-n-half Clue   5. comptabilité   sociology   seismology   theology   accountancy   Half-n-half Clue   6. étiologie   accountancy   astrology   etiology, aetiology   telegraphy   Half-n-half Clue   7. économique   telepathy   economics   choreography   telegraphy   Half-n-half Clue