1. astrologie   astrology   sociology   rheology   etiology, aetiology   Hint Half-n-half Clue   2. aéronautique   aeronautics   astrology   telegraphy   ornithology   Half-n-half Clue   3. sociologie   entomology   topology   sociology   seismology   Half-n-half Clue   4. télépathie   theology   aeronautics   choreography   telepathy   Half-n-half Clue   5. topologie   topology   astrology   calligraphy   accountancy   Half-n-half Clue   6. comptabilité   archeology, archaeology   accountancy   sociology   choreography   Half-n-half Clue   7. ornithologie   ornithology   cosmetology   anthropology   telepathy   Half-n-half Clue