1. économique   telegraphy   anthropology   economics   astrology   Hint Half-n-half Clue   2. topologie   seismology   rheology   accountancy   topology   Half-n-half Clue   3. télégraphie   telegraphy   rheology   telepathy   radiology   Half-n-half Clue   4. comptabilité   accountancy   choreography   topology   etiology, aetiology   Half-n-half Clue   5. aéronautique   rheology   economics   seismology   aeronautics   Half-n-half Clue   6. sismologie   sociology   telegraphy   seismology   radiology   Half-n-half Clue   7. anthropologie   etiology, aetiology   accountancy   anthropology   entomology   Half-n-half Clue