1. entomologie   entomology   etiology, aetiology   choreography   astrology   Hint Half-n-half Clue   2. calligraphie   calligraphy   sociology   archeology, archaeology   seismology   Half-n-half Clue   3. cosmétologie   cosmetology   anthropology   archeology, archaeology   radiology   Half-n-half Clue   4. astrologie   telepathy   anthropology   astrology   aeronautics   Half-n-half Clue   5. télégraphie   telegraphy   topology   archeology, archaeology   accountancy   Half-n-half Clue   6. chorégraphie   ornithology   astrology   choreography   telepathy   Half-n-half Clue   7. économique   sociology   etiology, aetiology   economics   seismology   Half-n-half Clue