Odd

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Across
  1. 4. Working of wonders or miracles
  2. 5. Insipid
  3. 6. Omnipresent
  4. 8. Prone
  5. 9. Cucumber-yogurt sauce in Greek cuisine
  6. 11. Jubilation
  7. 12. Unrealistic, idealistic quality
  8. 15. Bitter-tasting
  9. 17. What makes an object or idea unique
  10. 18. Something which may get in the way of an alien probe
  11. 19. A single, gliding vowel sound consisting of two or more vowels in a row
  12. 20. Highest point
Down
  1. 1. Expressing a vow
  2. 2. Fleshy hanging tissue at back of mouth
  3. 3. Cylindrical millipedes, alternative spelling
  4. 7. Garnet containing chromium, green in color
  5. 10. Unable to be stopped
  6. 13. Fictional elemental form in Project Hail Mary
  7. 14. One who complains a great deal
  8. 16. Repayment