Starts with 'O'

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Across
  1. 2. someone who is good at noticing things
  2. 4. the sum of the lifework of an artist
  3. 5. the state of being hopeful about the future
  4. 6. relating to the opera
  5. 7. someone or something that is truly unique
  6. 11. unbiased, not on a specific side
  7. 12. happening at the right time
  8. 14. functioning or having effect
  9. 15. someone or something that is all-knowing
Down
  1. 1. capable of being acquired
  2. 2. well-behaved, listens to commands and instructions
  3. 3. a favorable situation with a positive outcome
  4. 4. someone or something that is all-powerful
  5. 8. something that is still going on at the present time and is going to continue
  6. 9. your job or what you do for work
  7. 10. not reserved; frank; candid
  8. 11. showing a play of colors like an opal
  9. 13. a long journey or experience