1. animals of a region or era.   fauna   catharsis   foliage   eccentricity   Hint Half-n-half Clue   2. science dealing with sound.   atrophy   dissection   arboretum   acoustics   Half-n-half Clue   3. working of the brain or thought.   homeostasis   conduit   acoustics   cerebration   Half-n-half Clue   4. state of being motionless.   alchemy   equinox   immobility   cog   Half-n-half Clue   5. wasting away.   emollient   atrophy   converse   fulcrum   Half-n-half Clue   6. constituent or element.   eccentricity   efficacy   catharsis   component   Half-n-half Clue   7. guesswork.   anemia   catharsis   conjecture   delta   Half-n-half Clue