1. economico   telegraphy   entomology   economics   choreography   Hint Half-n-half Clue   2. radiologia   radiology   anthropology   choreography   etiology, aetiology   Half-n-half Clue   3. eziologia   ornithology   theology   telepathy   etiology, aetiology   Half-n-half Clue   4. entomologia   entomology   cosmetology   economics   archeology, archaeology   Half-n-half Clue   5. ornitologia   ornithology   telegraphy   choreography   cosmetology   Half-n-half Clue   6. astrologia   ornithology   astrology   etiology, aetiology   anthropology   Half-n-half Clue   7. reologia   archeology, archaeology   theology   rheology   accountancy   Half-n-half Clue