1. ornitologia   ornithology   astrology   cosmetology   accountancy   Hint Half-n-half Clue   2. economico   topology   economics   etiology, aetiology   archeology, archaeology   Half-n-half Clue   3. coreografia   choreography   telegraphy   aeronautics   rheology   Half-n-half Clue   4. entomologia   telegraphy   choreography   entomology   aeronautics   Half-n-half Clue   5. astrologia   choreography   telegraphy   astrology   aeronautics   Half-n-half Clue   6. cosmetologia   economics   radiology   etiology, aetiology   cosmetology   Half-n-half Clue   7. eziologia   entomology   astrology   topology   etiology, aetiology   Half-n-half Clue