Almost Palindromes

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Across
  1. 2. A number that can be divided by two without yielding fractions
  2. 4. Hunting dogs mostly used for bird hunting
  3. 8. A feeling of intense sadness or grief
  4. 10. The third letter of the Greek alphabet
  5. 12. Usually applying to eggs, but occasionally ham
  6. 14. To indulge, in either luxury or self-pity
  7. 19. Along with 21 across the theme of this puzzle
  8. 20. Montana and Main, for example
  9. 21. Along with 19 across the theme of this puzzle
  10. 22. Most of us have about 32 of these in our body
  11. 23. 28th President Wilson
Down
  1. 1. This chapeau is considered French but is actually Basque in origin
  2. 3. A famous masked swordsman
  3. 5. Author of Siddhartha and The Glass Bead Game
  4. 6. What the Shaft is to Butte, in terms of geography
  5. 7. Multiple reps will work your upper back, or a type of diaper
  6. 9. Talking Heads front man Byrne
  7. 11. The capital of the Bahamas
  8. 13. Removed or erased
  9. 15. To kick out or the thing doing the kicking
  10. 16. The most commonly used natural fiber
  11. 17. A consummate worrier
  12. 18. To have a grudge with someone
  13. 24. Stiff, either literally or in demeanor