Answers may vary. Here is one possible matching:
4. retribution - punishment; revenge
cryptic - puzzling; obscure
coveted - desirable; longed for
quarry - prey; target
balmy - temperate; soothing
5. Zaroff thinks people are no more than animals.
6. Rainsford's turning from hunter to prey
7. foil
8. victim
9. unreliable narrator
10. from cheerful to sinister