1. topologie   topology   accountancy   calligraphy   aeronautics   Hint Half-n-half Clue   2. télégraphie   telegraphy   cosmetology   choreography   calligraphy   Half-n-half Clue   3. cosmétologie   radiology   entomology   cosmetology   theology   Half-n-half Clue   4. étiologie   etiology, aetiology   choreography   telepathy   anthropology   Half-n-half Clue   5. sociologie   sociology   telepathy   cosmetology   ornithology   Half-n-half Clue   6. sismologie   telegraphy   rheology   topology   seismology   Half-n-half Clue   7. télépathie   cosmetology   astrology   telepathy   aeronautics   Half-n-half Clue