Greek Alphabet

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Across
  1. 4. say out loud oops-salon 😉
  2. 8. Symbol is letter after W
  3. 9. 19th Greek letter
  4. 11. Δ
  5. 13. Ξ
  6. 15. Begins with the letter after J
  7. 18. last Greek letter
  8. 20. strain of Covid named after it
  9. 22. symbol shaped like a wooden cane or walking stick
  10. 23. 2nd Greek letter
Down
  1. 1. Ψ
  2. 2. resembles a ‘P’
  3. 3. cows go?
  4. 5. Φ
  5. 6. Λ
  6. 7. Sounds like the opposite of old
  7. 9. Θ
  8. 10. Σ
  9. 12. comes after Delta
  10. 14. first Greek letter
  11. 16. begins with an ‘I’
  12. 17. 3.14
  13. 19. Greek symbol is ‘H’
  14. 21. starts with last letter of English alphabet