1. astrologie   choreography   calligraphy   astrology   accountancy   Hint Half-n-half Clue   2. aéronautique   telegraphy   aeronautics   telepathy   entomology   Half-n-half Clue   3. rhéologie   rheology   ornithology   economics   sociology   Half-n-half Clue   4. ornithologie   ornithology   calligraphy   archeology, archaeology   etiology, aetiology   Half-n-half Clue   5. télégraphie   telepathy   anthropology   telegraphy   astrology   Half-n-half Clue   6. anthropologie   seismology   theology   aeronautics   anthropology   Half-n-half Clue   7. télépathie   calligraphy   telepathy   rheology   radiology   Half-n-half Clue