1. anthropologie   topology   aeronautics   anthropology   ornithology   Hint Half-n-half Clue   2. topologie   ornithology   topology   archeology, archaeology   telegraphy   Half-n-half Clue   3. entomologie   sociology   cosmetology   theology   entomology   Half-n-half Clue   4. aéronautique   radiology   rheology   aeronautics   topology   Half-n-half Clue   5. chorégraphie   accountancy   calligraphy   choreography   anthropology   Half-n-half Clue   6. astrologie   astrology   theology   telepathy   choreography   Half-n-half Clue   7. étiologie   etiology, aetiology   economics   ornithology   astrology   Half-n-half Clue